SD Card Toolbox. Lock and unlock with password. CID reading and more…
⚠️ Note: Functions described here are for the old version of SD Card Toolbox
New version
SD Card Toolbox PLUS contains all the described functionality plus other new features such as
CID write on CID modifiable SD cards
Reading the SD card CID number was a cumbersome and inconvenient process that took more time than it should, especially for Windows users. Not to mention locking and unlocking an SD card with a password, it was impossible on the Windows operating system at all.
We believe that this process should not be so tricky and inconvenient, so we have created a small handy device for tasks with an SD card security features and called it SD Toolbox. As this has been a great success among the users, we understand the importance of the device and are constantly updating it and offering new features.
So let’s dive into the opportunities it offers…
Main features
- SD, SDHC & SDXC cards supported
- Read the SD card type and size
- Read & Decode SD card CID number
- Decode the CID number without the SD card
- Read & Decode CSD number
- Lock & Unlock the card with the password
- Set/Remove temporary write protection
- FAT32/exFAT partition hiding
- Erase the card and remove all protections
⚠️ Unfortunately, it doesn’t extract unknown passwords from SD cards. The password must be known to unlock the SD card
Because this device has gained success mainly among car electronics enthusiasts and professionals, we have added some optional features especially for them
Optional features
Unlocking/Locking fixed password cards:
- Mazda DENSO (MAZDA 3 MPS BL, MAZDA CX-7)
- Mitsubishi MMCS (Navi model: NR242xx (W11, W12, W13, W15, W17, E11, E12 ))
- Mitsubishi NR-MZxx (Navi model: NR-MZxx. Used in Mitsubishi, Mazda, Nissan Note)
- Peugeot/Citroen MMCS (Peugeot 4008, Citroen C4 AirCross (P11, P12, C11, C12))
- Lexus/Toyota gen.8/9 microSD (MAP) and internal SDHC (boot) (Lexus ES, GS, GX, IS, LS, LX, NX, RX, RC, RC-F from 2015, Toyota Land Cruiser 200 from 2015)
- Toyota/Lexus/Nissan various models (Toyota Prius PHV 2018, Pioneer CVX-2458 (Lexus RX350 and others), other various models used in Nissan/Toyota/Lexus vehicles)
Online SD card password calculator for VW, Škoda, Seat RNS315 navigation systems from CID number
Reading NISSAN Leaf SD card password from navigation unit
Indicators and controls

- Menu bar
- SD card status indicator. Shows locking and write protection status
- SD card type and size
- SD card CID number (hex format)
- CID decoder
- Password field (password size: 1-16 bytes in hex)
- Set/Remove password buttons
- Set/Clear write protection buttons
- Forced erase button
CID decoder
CID decoder is activated by pressing button with a question mark next to CID number or from Menu View/CID register.
It can be used as CID decoder without SD card. When SD card is removed, CID field is editable, you can input any CID to decode.

CSD decoder
CSD decoder is activated from Menu View/CSD register

Locking/unlocking the SD card with password
SD card locked with password is protected from any access to SD card data. When a locked SD card is inserted into the PC, it is not detected by the system at all, and no read/write or any other functions are allowed.
- Insert SD card into device’s SD slot
- SD card will be detected, and SD type, CID number, and status will be shown
- If SD card is locked, the status indicator will show a red lock; if unlocked green
- Input 1-16 bytes password in HEX (2-32 symbols) to the password field and press Set to lock or Clear to unlock
- If SD card locking is successful, the SD status indicator will change the lock symbol to red or green

Setting / Removing write protection
Write protection is used to protect SD card data from modification of its contents. When write protect is set, the SD card inserted into the PC reader is read-only and can’t be formatted, erased, or have any new data written.
There are 2 types of WP: temporary and permanent. This device can set or remove temporary WP only; if permanent write protection is set, it cannot be removed anymore. The type of write protection set can be checked within the CSD register. There are 2 flags, PERM_WRITE_PROTECT and TMP_WRITE_PROTECT
- Insert SD card into device’s SD slot
- SD card will be detected, and SD type, CID number, and status will be shown
- To set write protection, press the Set button; to remove write protection, press the Clear button
- SD card write protection status is indicated on the SD status indicator

Forced Erase
If the SD card is locked with a Password and the password is unknown, SD card is unusable. It’s possible to remove password protection with the Forced Erase function, and it will allow using the SD card again. Forced erase clear password, write protection, and ERASE ALL DATA on the SD card, and data from SD card can’t be recovered. So, use it with caution!!!
Menu Items
View – view SD card registers values (CID, CSD)
Mode – Select password mode
Custom password – used for locking and unlocking with any desired password
Toyota/Lexus/Nissan – used for various Toyota/Lexus/Nissan SD locking and unlocking
Mitsubishi – used for Mitsubishi MMCS & NR-MZxx SD card locking and unlocking
Mazda – used for Mazda 3, Mazda CX7 SD locking/unlocking
Citroen/Peugeot – used for Citroen/Peugeot MMCS SD card locking and unlocking
Tools – optional tools
RNS315 PWD Calculator – online SD card password calculator for VW, Škoda, Seat RNS315 navigation systems from CID number
Hide/Unhide FAT32/exFat partition – hides/unhides partition with Navi data. SD card contents with a hidden partition cannot be seen with a PC reader, but the navigation unit can read such SD⚠️.
⚠️Works on most Toyota, some Nissan, Mazda, and other Navi units.
Mass Production Mode – automatic CID comparison, locking, and write protection
Downloads
⚠️ Important: The Software below is for the SD Card Toolbox (old version). Software for the SD Card Toolbox PLUS can be found on the product page.
SD Toolbox installation (v2.5.0)
SD Toolbox portable version (v2.5.0)
Update log
Version 2.5.0 (2022-01-15)
- FIX: disabled lock/unlock/set wp/remove wp actions if SD card is not inserted
- NEW: Mass Production Mode:
- bulk CID comparison
- auto lock/unlock
- auto lock/unlock on CID match
- auto set/remove write protect
- auto set/remove write protect on CID match
- NEW: added right-click menu on CID field for fast access to CID decoder and CID compare
Version 2.4.5 (2021-03-10)
- CID decoder – “0x” removed before Hex numbers
- Mazda DENSO SD locking
- Mitsubishi NR-MZxx SD locking
- Toyota/Lexus/Nissan SD locking (new models added)
Version 2.4.3 (2020-10-21)
- FAT32/exFAT partition hiding
- minor bug fixes
Version 2.4.2
- Added Lexus SD unlocking (Boot SD) for Pioneer CVX-2458
- Firmware update bugfix
Version 2.4.1
- Added HEX validator for CID input field
- Fixed WP status for permanent WP
(now shows WP ON if permanent WP is set)
- Mitsubishi MMCS SD card locking/unlocking
- Lexus/Toyota generation 8/9 microSD(MAP) and internal SD (SW) locking/unlocking
- CID CRC value fixed
Version 2.3
- Fixed the incidental software freezing on card change
- Fixed SDXC support
- CID register information display in hex has been added
- CSD register view & decoder added
- CID CRC value fixed
- PC-Tool communication protocol bug-fix
- Display of SD size in GB next to type added
- PWD is always in lower case for easier readability
Read more
Hello. Can I use your device to work with Pioneer SD cards (remove passwords, unlock, copy), which are used in RZ and CZ series radios? Thank you.
Hello. This device can be used with any locked sd cards if password is known. This device includes some fixed password SD cards unlocking (including some Pioneer radios for Toyota and Nissan), but i can’t tell will it work with RZ and CZ radios, as i didn’t tested it myself.
Thanks for the reply. I’ll try searching online to see if anyone has encountered something similar. If you have any experience with Pioneer CZ and RZ series cards, please let me know.
Hello.
Please explain to me how I have unlimited access to password generation
Hi. SD Card Toolbox PLUS with Premium Access can be used for RNS315 cards locking/unlocking unlimited while Premium Access is active. So, CID changing on supported cards and RNS315 card lock/unlock can be used unlimited times as long as Premium Access feature is active.
Using this feature for rn315 locking, password is not seen. If you need to get a password by CID, you have to use online password generator.
Hello!
Tell me please if I can use this software to encrypt data on a micro SD card using a CID?
I have navigation maps that I made myself. I want to give them to friends, but so that they cannot copy the maps to other micro SD cards. Will it be possible to make encryption using a CID?
Hello, if you will encrypt data on SD card, you must ensure that navigation unit could decrypt it. Navigation unit firmware must understand your encryption and decrypt data itself.
So if you will encrypt data on SD card with unknown method for navigation unit, nobody could read it and it will be useless.
Other ways as partition hiding or similar will not help to protect card from clonning.
its that just for rns315 or can i change sd other sd cards maybe sd card AS vw
I don’t understand your question. What exactly do you want to find out? RNS315 is an online SD card password calculator. SD card toolbox PLUS is a universal tool that works with any SD card as described in the product description
I bought SD card 315 and it can only be used once. I can then remove cid and use it for other RNS 315 as well
It can be used multiple times. You have to unlock it, delete ‘deviceid’ file and lock back with the same password and card is ready for reuse
hello, am in uganda east africa
i would like to get your tool.
how can i get it?
Hello,
You can buy it in webshop. I would recommend to use Express Shipping, as standard shipping to Uganda can take 3-5 weeks.
https://zelemar.eu/product/sd-card-toolbox-plus/
I received the SD Card toolbox PLUS today. It seems to be a great tool.
However, it will not recognize any of my *Micro* SD cards and the program shows “SD Card removed”. Is this normal?
The card is fully inserted with the contacts facing downwards (i.e. upside down).
When I use a MicroSD-to-SD card adapter everything seems to work fine. Is it OK to use an adapter?
If yes, then that’s fine for me.
microSD slot is not supported yet, it will get support with a future software updates. Currently working on CID change and some other priority tasks, and later will add microSD slot support. For now please use a micro SD adapter.
My system is Windows 10, and when I insert the toolbox, it flashes briefly. I have also installed the COM driver, but now it’s not working and I can’t read the CID. Could you please guide me on how to fix this? Additionally, can the newly released SDTool 2.65 version be used with older card readers? I tried using version 2.65 and I couldn’t read the CID either. Thank you.
Hi, you have to check in windows Device Manager for a USB serial ports. SD Toolbox must be detected as USB Serial Port and have a FTDI drivers installed. Try to plug/unplug toolbox and check is it detected by windows or not. If its detected, reinstall FTDI drivers for this port and try to run software. Version 2.65 still supports old hardware.
Can old hardware support modifying the CID with version 2.6 software?
No, old hardware doesn’t support CID change.
Hello Zelemar
I have sd tool box for 3 years. Was working fine but now is asking for activation code when I want to unlock sd card. What now ??
Hi,
Please send me a request code and i will send you activation key.
I don’t know the password of th sd card,can I read data of the sd card?
You will not be able to read data from sd card if password is not known.
Thanks for the Card reader and the app.
Both worked first up!
If I wanted to put my Toyota 2017 Rav4 Toyota (1) MicroSD card {-not pass-worded) in my other compatible Toyota 2014 Rav4 (2) MicroSD card (-not pass-worded) is there a way to allow Toyota 2 to use Toyota 1’s maps? – even if I buy a SD card from you and cloned the SD card from the original?
Looking at the details on the SD card from your app, I am guessing that as the Maps licence (.lyc) looks encrypted it has to match the CSD and PNS somehow or vice versa of the vehicle it is being used in?
Can you explain even if this is possible to do? And if so, how?
Or is this as far as I can go with these Toyota Maps and your current hardware and app?
Cloned Toyota SD cards to another card with the same CID usually works without any issues. Maps are locked with the license file to card CID number. Some Toyota cards are locked with password and cannot be copied easily, so SD toolbox allows to unlock some of these cards to access data.
Few days back i have purchased this device can we change the id card id with this please tell me some thing about it.
you will not be able to change card id with it. Card CID is read only with this tool
Hello,
can i use the Toolbox also to make a Backup for VW,AUDI or SEAT navigation SD Card. And ensure that it will work.
It cannot be used directly to make a Backup. SD card backup can be made with a number of clonning software. The simple and good working software for backups is HDD Raw Copy tool
The most of navigation SD cards are protected by encrypting contents or creating license files by SD card CID number. That’s where SD Toolbox can be usefull, it allows to read CID which is necessary for custom CID sd card ordering. Also it can be used for VW rns315 navigation cards locking and unlocking, as well in other tasks described in the article
Hi I got my box today but I can´t download setup250.exe.
Please use the link to download it. It’s not an exe file, it’s ZIP archived installer. If you cant download it, probably your browser is blocking it.
Hi,
I changed the browser to Chrome and then I could download the file.
I had to press the card in the slot with my finger to be able to read the card.
Is that correct or is it somthing wrong with may box?
RTegards Tommy J
Hi,
nope, SD card slot must be working without any issues. Maybe something fell inside. Try several times in series to insert and remove SD, and it should work without any pressing on card.
Can u send this product to China ?
Yes, sure i can.
Writes the device is not inserted, but the system sees the card.
The software works with the SD toolbox hardware only! it doesn’t work with a regular SD card reader.
Mitsubishi – used for Mitsubishi MMCS
Does it need specific cid + pw ? or just lock any sd / Cid in MMCS mode ?
MMCS doesnt need specific CID, any SD card of 16Gb can be used. Password is the same for all MMCS units and not related to CID.
Contents must be cloned, not copied, as it contains some hidden data with navigation software/firmware.
so just use your MMCS mode + “Mitsubishi MMCS” and set password
Yes, use MMCS mode and set password. If you want to unlock the original SD from MMCS, press Clear password
Happy new year…..any news for new sd tiolbox?
Now on other sd toolbox option for password for cid is free……
Is possible to change CID on other sd card than original from car?
The current SD Toolbox version can not change CID on any cards.
Windows 10 Defender reports SD Toolbox portable version (v2.5.0) as Trojan:Win32/Wacatac.B!ml
SD Toolbox portable version is packed (.dll and .exe packed to a single .exe file), that’s why some antivirus is suspicious about that. I can assure you, the software is clear from viruses and trojans
Thanks for the program.
Could you pelase consider to enable multilanguage interface?
Thanks.
Thanks for the suggestion. I will consider that.
Unfortunately it seems the device is able only to read the CID number and doesn’t allow to change it. Is there a future update planned for such functionality
But other seller has this function to change cig on samsung
CID change on Samsung EVO easily can be done on Ubuntu. CID change feature in SD toolbox is planned in the future and probably not only for Samsung 😉
Do will need to change sd toolbox for your next updates ……..?
I have some planned updates for the same hardware. But the CID programming option probably will require hardware changes.
When is the new hardware coming? I want to buy a device. Should I wait?
It’s still in the development phase and it’s hard to predict a release date yet. You can buy an existing device now and start using it.
Hi,
I inserted the card into the microsd slot in my pc, ran the software, but only get a greyed out sdcard graphic in the UI, like it’s not connected.
Computer shows its connected though, any ideas?
HI,
SD card toolbox software works only with its own hardware, not with the PC reader. So you have to use SD toolbox hardware and software together.
Memory Card Write Protection Remove From This Tool ???
There are 2 types of Write Protection: temporary and permanent. Temporary write protection can be removed using this tool, permanent – not.
Hello
I bought a SD Card Toolbox a few weeks ago and received it today. Unfortunately it seems the device is able only to read the CID number and doesn’t allow to change it. Is there a future update planned for such functionality ? If not, can you please recommend a tool that can do this ?!
Thank you
Best regards,
Robert P.
CID changing is not possible yet. Currently we are working on it and i really hope to offer CID changing in a future updates. But its in the development stage still.
Thank you for the quick reply. I hope you can make it happen. That was the only reason for buying the tool, I didn’t think it only reads it, I thought it can also change it … Happy Holidays
Best regards,
Robert P.
Issue resolved very quickly with help from Zelemar. I can now use the SD card reader to read codes. Thanks for all your help in resolving the issue so quickly. Great service !!!!!!
Hi.
The SD card toolbox reader arrived today, I have downloaded and installed the software from your website. However when connected to my PC (running Windows 10 Pro, 16gb ram) and SD card inserted into reader, reader flashes a Blue light once but software says SD card removed then after approx 10 seconds software program says it is not responding
Can you help ?
Regards
Dave
Hi Dave,
Please take a look to the left bottom corner on software window. Does it say ‘Device connected’ ? What message you have there when starting software with reader plugged in?
SD toolbox works thru virtual com port, the number on bottom left side shows how many ports detected on your PC and tries to connect to reader by sending requests to each port one by one. If there are unresponsive ports such as Bluetooth com ports actually not connected to PC or some dead com port drivers, software doesn’t receive response and might wait forever.
There are 2 solutions at the moment:
1. Check your com port in Control Panel and disable unused ports
2. Start 2nd instance of SD Toolbox software and then close the first one. 2nd instance of software will not be able access problematic com port because its occupied with the 1st instance and should work normally
This problem is pretty rare, but sometimes it happens and I will fix this issue in new software versions
sd card toolbox,what kinds of supported cards can be written Cid?
Hello,
Current 2.6.5 version can write to Samsung EVO, EVO+ (old ones). Coming version will be able to write CID to a lot of sd cards with specific chipset used in some Transcend, Lexar, ATP, Swissbit and others.
hello,
I installed the toolkit, but it seem to need a special SD Card reader ? It reports device not connected…
Hi,
Yes, it is necessary to use special SD card reader SD CARD TOOLBOX
Regular SD card reader can’t be used for CID reading and card locking on Windows.
Can i knowyour tool can unlockit the bmw headunit sd card with password?because i know is sd card problem but it lock we cannot do anything.
Password must be known to unlock it. If you don’t have a password, you will not be able to unlock it.
[…] be built to match voltage levels between navigation unit and PC. I have built this interface in the SD Toolbox hardware and implemented SD card password reading from navigation unit. Debug interface can be used […]