Hacking What are the ._files on my SD card?

[ples]

I noticed all of the WADs on my SD card have a duplicate file that is preceded by a "._". What are they for, and can I delete them?

 

[djtaz]

you should be able to delete them - try putting them on your PC for a while first taken them off your card.

 

[pelago]

I noticed all of the WADs on my SD card have a duplicate file that is preceded by a "._". What are they for, and can I delete them?

I believe that's a problem caused by using a Mac. You can delete them.