Recuva V1.53 Setup -

Can be run from a USB stick to avoid overwriting data on the host computer. Step-by-Step: Recuva v1.53 Setup Guide 1. Download and Preparation

The short answer:

If you deleted a file from your C: drive, do not download Recuva to that same drive. If you delete a photo from an SD card, do not take new photos. Writing new data overwrites the "deleted" data, making it unrecoverable. If your lost files are on the main system drive, it is best to use the "Portable" version of Recuva on a USB stick, but if you have already run the v1.53 setup on the system drive, proceed with caution. recuva v1.53 setup