Help Can't write to internal or external SD card from computer

[Wirelesspete]

When my phone is plugged into my computer via USB, I can't copy files from the computer to either the internal or external SD card, any folder. If I connect my external SD card to the computer via a card reader, I can copy fine.

 

[speedycolzalez]

Can you see the drives? Are you getting any error messages?

Try installing Kies. This installs all the drivers for the S2. You can uninstall Kies and just leave the drivers.

 

[Wirelesspete]

I've had Kies installed since day 1 pretty well. Kies won't write to the drives either. I can see the drives from the PC, but when I go to paste a file to them nothing happens, the little "copying" window comes up but it does nothing, it just stays there until I kill it, 10, 20, 30 minutes later.

Inability to write to storage seems to be a fairly common problem:

http://www.chainfire.eu/articles/113/Is_Google_blocking_apps_writing_to_SD_cards_/