questionswhat things should one know when shopping for…

vote-for3vote-against
vote-for3vote-against

Are you talking about a traditional USB flash drive?

I think the two most important considerations beyond items you have listed are warranty (some are notoriously unreliable) and making certain it doesn't block other USB ports.

How important is security to you, regarding encryption? Kingston has a "Locker" line of flash drives which have a pretty good reputation for reliability and security, but I wouldn't trust information of vital importance on there (say, thousands of customers credit cards or something).

If you REALLY need security, buy an IronKey USB. Pricey but you can't beat it at the moment.

vote-for1vote-against

@novastarj: Yep, traditional "thumb drives".

Edit: As far as the encryption goes, I'm more interested in ease of use first, then higher end security. Some built-in encryption kits have terrible usability.

vote-for1vote-against

After a short bit of research, I am still unable to figure out why some USB flash drives will let you boot from them and some will not.

Any insight on that would be greatly appreciated.