a flash drive, is a small portable "disk" that typically plugs into a usb slot, and then shows up as an extra hard drive (D: or E: or something like that, depending on what type of computer you're using)
it can contain a number of files -- word docs, excel spreadsheets, images, etc.
You would have to open one or more of the desired files, using an appropriate program designed to read said files, in order to extract the information (maybe via copy/paste) into the target profile bio.
I'm sure, this may raise more questions in your mind. Feel free to ask them. We'll help you as best we can.