how do i recover all my files on my android device

[AC Question]

i have lost all my music on a sd card

 

[Rukbat]

Check the card in a computer. If it's not there, take a look at PhotoRec. It will recover anything that looks like a file, even if the card's file structure is damaged. (If the card is large enough and has enough files on it, it can take days for a full recovery.)