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The best way is to create an image file of the partition with the found files and write it to another hard drive or logical disk. This image can later be processed by a commercial version of R-Studio the same way as the original partition, and those files can be restored. You need free space on a disk for the image file of at least the same size as the partition and NEVER TRY TO WRITE THE IMAGE FILE OR RECOVER DELETED FILE ON THE LOGICAL DISK WHERE THE FILE HAS BEEN FOUND OR YOU MAY LOSE YOUR DATA ON THIS DISK!
We recommend you to create the image immediately, because there is a serious risk that the OS may overwrite the sectors, where the deleted files reside, in the course of its operation. If this happens, the files still may be found, but may contain incorrect data, or cannot be found at all.
Please note that, as the OS constantly writes something on disks, there is no guarantee that the data will be restored correctly from the image, because the files may have been already corrupted before the image file is created. An image file only guarantees that it would contain exact data copy from the disk at the moment when the image file has been created. Nevertheless, there is always a chance that the data will be recovered successfully.
regardless of which program you use, you'll want to read the instructions thoroughly and consult their FAQ frequently while you use the program. this is the sort of work that you would otherwise pay several hundred dollars for a specialist to perform... but luckily you shouldn't have to resort to that, since it sounds like your drive is still in good mechanical condition & doesn't need to be disassembled or anything. just remember to be calm and proceed cautiously, so that your data does not get damaged any further than it already has been.