recommendation for flash drive

Solution
I usually buy Integral brand, but any well-known brand should be reliable - - just avoid cheap generic ones.

Not sure what you have in mind when you say "profitable" though -- unless you're intention is to make some money with it (which is what profitable means). Perhaps you just used the wrong term.
I usually buy Integral brand, but any well-known brand should be reliable - - just avoid cheap generic ones.

Not sure what you have in mind when you say "profitable" though -- unless you're intention is to make some money with it (which is what profitable means). Perhaps you just used the wrong term.
 
Solution