Greetings All, I have three pen drives, (A) an elderly 128MB Lexar, (B) a newer (unknown manufacturer) 128MB one, and (C) a very new 1GB drive, again with no label on the outside. They behave differently in RH9, FC3, and FC5. The following results are all with KDE. In FC5 all work as desired, giving automatic detection and a icon on the desktop for manipulation. In FC3 (A) works, but must be mounted by command line---no icon. (B) is the same but is very slow. (C) shows an entry (USB-DRIVE) in /media but is not mounted. Material copied to it stays on the machine and never appears on the drive---no icon. In RH9 (A) works but must be mounted by hand. Plugging in (B) kills the machine to the point that not just X-windows but Linux must be rebooted. I haven't tried (C) on that machine yet. My question, Is there any place where one can research what is going on here, and how the machines know the difference between the drives? If there is a HOW-TO on this subject, I don't seem to find it in the lists. Thanks for any ideas.