I have a 32MB flash drive and I though of experimenting with my TimeMachine on my MacBook Pro . I never used time machine before. I deleted everything from my flash drive and opened up time machine. I then selected my flash drive to be used as a back up drive, I was asked to erase flash drive and reformat ... I wasnt to sure about it but I did it anyway [stupid I know, dont bash me] so TimeMachine began to back up onto my flash drive, then I got a notice that said that I cant back up on my flash drive as it only has 31.2 MB where 91MB was needed. So I took it out. Less than a minute later I inserted my flash back into my mac and it was not being detected. I cant find it in my finder or my desktop.. I even looked for it using spotlight and nothing was found. Its brand new and I really hope I could use it again. Somebody please help. p.s I also tried using another flash drive and it was detected as soon as it was inserted.