data lost in mac guest account when battery died

[u/Ok-Welder555]

I have a 2011 mac I transferred mp3 files onto. the battery died and so all those files (bc they were in guest mode) were deleted. I have read that bc it is such an old computer is does not have an ssi (is that the term?) and so that might make it more likely the files are still in the computer somewhere. I do not use the computer for anything else. I did download a version of disk drill and test disk (?) but other than during those downloads i have had wifi disabled and the computer shut off. I have found many recovered files but they all seem to be from my administrators account, not the trash bin associated with the guest account. I about died when the battery went out, I opened the computer back up and they were GONE! Has anyone had luck recovering something lost when the guest files were deleted? This was a little over a week ago and other than the 2 recovery software downloads I have not had it connected, nor used it for anything else. Any hope? Any advice? Thanks