I have a removable hard drive connected by USB for which I have changed the drive letter from the automatically assigned 'K' to my choice of 'T'. In the past the assignment has occasionally defaulted to 'K', but recently I have found that my own assignment will not stick from one session to another. I use the drive for backup, and plug it in only at the end of the day for my backup session using a program in which my 'T' drive is named, so currently I have to change the letter from 'K' to 'T' every time I need to do the backup. I have WindowsXP SP3. Are there any suggestions as to how to deal with the problem? As I say, it is only quite recent.