Are all usb ports and flash drives compatible?

[gumbob3]

I know that USB 1.1, 2, and 3 are all backwards compatible. We have an about 10 year old Dell PC, any ideas on which USB ports it would have? Also, would it be compatible with a USB 2.0 OR USB 3.0 flash drive? THANKS

 

[Snipergod87]

Yes, if you plug a 3.0 device into a 1.1 port it will work, just at 1.1 speeds.

Your old dell is probably using 2.0 ports.