I had encrypted an external hard drive with Bitlocker but the Bitlocker encryption process stuck somewhere in the middle and now the disk can't be opened and gives the message "H:/ is not accessible. The parameter is incorrect". The same popup window appears when I try to turn off Bitlocker Drive Encryption. I have even tried using the Bitlocker repair tool but with no success. These seems to be no other way to get my important data back other than formatting. Please HELP !!