This post will go over the error message “The disk is not formatted. Do you want to format now” error message you might receive when plugging in a drive that has been encrypted using “Bitlocker To Go”.
If you are getting this error message your drive is formatted using NTFS and NOT Fat/Fat32. Microsoft does not seem to support NTFS Bitlocked drives on Windows XP or Windows Vista.
Even if you format the drive with Fat/Fat32 and then re-encrypt the drive you can only READ from the drive. If you need to put other data on the drive you have to go back to a Windows 7 machine to do it. The version of Windows 7 doesn’t matter for adding files ONCE the drive has been Bitlocked. As we all know only Enterprise and Ultimate can do the original Bitlocking.
As seen in my “Everything you need to know about Bitlocker To Go” article there are several files that are used to read the large partition file on the Bitlocker drive. I figured maybe if I copy them to my XP computer and then run it when I plug in an NTFS drive that has been Bitlocked maybe I could open it that way!
You can try it yourself but I could NOT find a way to make it work.
So to sum everything up if you are getting the “Bitlocker To Go” error message “The Disk in drive X is not formatted” in Windows XP or Windows Vista the flash drive you are using is formatted as NTFS instead of Fat/Fat32!