I absolutely love my flash drive. It allows me to easily store large amounts of data and bring files with me while travelling that I would not bring if I had to have on paper. It also allows me to create digital images while travelling that can then be brought home.
There are two problems with it.
I tend to leave it everywhere. I probably forgot it at least 6 times while travelling over the past two week.
The other thing is that one needs to back up the data on the flash drive as soon as one returns home. That I did. I would hate to lose all that information and all those images. So....don't let your flash drive "copy" of file or a record be your "only" copy. The risk of losing it is too great.
