Download iCare Data Recovery and launch the file icarepro.zip or icarepro.exe (please do not do any operation to the drive once data lost. iCare Data Recovery is read-only program that won't do any change to your drive if you just use iCare to scan the lost drive)
STEP ONE: Launch iCare and then click one recovery mode (usually 'Deep Scan Recovery' is recommended)
Step Two: Select the drive that you lost your data to start data scanning. Then you need to wait for scanning process to finish.
How long shall I wait for the software to finish the scanning?
For a 500GB data - 1 hour. If it takes more than 10 hours searching lost files from a 2TB drive, the disk may get corrupted. You need to cancel the searching and wait to see what's already found there.
Step Three: preview lost files (photos, word, excel files can be previewed)
Step Four: save found files to a non-data-lost disk