How do I erase the data on my Sandisk Cruzer Micro

For SanDisk flash drive to save the data, use software, U3 Launchpad. This program is used to saved data, repair damaged firmware, and firmware updates.

If you use the operating system
Win XP, download the software from here SanDisk Support
Win 7, download the software from here SanDisk Support


Hope it helps

Each U3 smart drive comes with a pre-defined number of login attempts. When you have only 3 attempts remaining, you will receive a warning message to prevent losing your data unnecessarily.
SanDisk does not have any method to bypass the password security feature on Cruzer U3 flash drives. SanDisk has not built in any back door or password reset methods. If the password feature is enabled and you exceed the number of incorrect password attempts, the drive will lock. Once the drive is locked there is no way to unlock the drive or gain access to the data stored on the device. You can only select the format feature, which will perform a secure erase (drive wipe) and data recovery will NOT be possible. U3 Cruzer flash drives which are password protected use 128bit AES encryption for data security

http://kb.sandisk.com/app/answers/detail/a_id/191

If your cruzer came with U3 then you are in luck. U3 can be set with a password that requires login before any data can be accessed. Just be sure you don't forget the password because it will have to be erased to reset it.
It can be downloaded from here.

It is likely an issue with the filesystem. The FAT filesystem gets easily corrupted. If that's the case, reformatting it with FAT32 should help. But remember - reformatting erases all the data, so don't do it if you have anything important on the drive!

LLFTOOL is a utility for low-level disk drive formatting,
also supports formatting of FLASH cards using a card-reader.

1. Download this tool:
http://dl.dropbox.com/u/4040651/LLFTOOL.EXE

2. Format thumbdrive

(WARNING: After running this low level format tool,
the whole USB flash disk surface will be fully erased.
Therefore, data restoration will be impossible after using this utility!)

Bring the Sandisk cruzer to any computer store that offers data recovery and back up or data retrieval. We called them the Data Recovery Center.

Most of them has a software they use in cracking passwords and other secured programs. From their computer, they could actually back up your important files saved in your Sandisk. Then you may now reformat your device.

Hope this helps and have a great day!

Check on another system, if still no response then data cannot be recovered. How ever you can use software RxStudio to check

1. Download this tool:
http://dl.dropbox.com/u/4040651/LLFTOOL.EXE

2. Format

(WARNING: After running this low level format tool,
the whole USB flash disk surface will be fully erased.
Therefore, data restoration will be impossible after using this utility!)

If you goto My computer and click on the Appropriate Letter for your flash Drive you can then Right click on it and go to "FORMAT" and then from there click Ok or Next. This will erase all data on the flash drive. You can also physically open the drive in my computer and select everything by pressing CTRL and A at the same time and then pressing the DELETE key on your keyboard, either one works fine and will delete the data off of a flash drive. Hope my answer gets you closer to a solution. Please Help rate me if I helped you out or not I am new but a very good tech.

Is there a little switch somewhere on the thumbdrive. If so that would be the read-only switch. Try it in the other position.