hi all, having an incredibly frustrating problem year. have a year's worth of my work on this ONE external hd, it has been failed for a while but always let me copy off of it after attempting to repair from disk utility. in fact it just worked earlier today, copied some stuff, then switched to another computer, so back up the rest and boom. in disk utility it still gives me the error "cannot rebuild, back up as many files as possible", but now the hard drive isn't mounting anymore. i also tried terminal, which also recognizes the hd, but says it's "busy" or "permission denied" tried diskwarrior, said it couldn't fix it. but i can SEE that the drive is still there, and i'm sure those files are still there. it's just not mounting to let me backup. i KNOW the files are there and there must be a way/easy fix! now i'm just letting it (and myself) cool off after many attempts, i'm afraid to keep trying this to damage it further. it is occasionally clicking. any insight appreciated and hope this can help others with this issue!!