If you put them into a folder on the computer, without using a specific program to move them (just connected the phone to the computer via USB and put them in a folder) then they will be in that folder. If you used a program to move them over to the computer, then you would have to search that program for where it saves them.
Also, there are a few apps/programs out there that 'may' be able to help you recover the data. These are for phones.
A few of the programs you could try would be... DiskDigger, MobiSaver, Android-Recovery and Tenorshare. They are all data recovery apps/programs. There are many others out there, so check around and see which you would rather try. There is also one called RECUVA, that I have heard is free, which...