"Quick Scan" and "Deep Scan" are two scan modes of data recovery programFonePaw Data Recovery.like
Literally, "Quick Scan"takes less time than "Deep Scan". When you connect your device to the computer, launch the program and begin the scanning, the quick scan process will start automatically and ends within minutes. The reason why it performs so fast is a it only scans for certain volumes, lost volumes or removable media. You can find most of you data through quick scan.
However, if you can't find the files you need after the quick scan process, you will need theDeep Scan . It scans the whole drive to find out more data. Meanwhile, it will take a longer time as well because there is so much data to be scanned. The result of deep scan process will be more prices and detailed.
In short, "Quick Scan" will be fast but it only scans on some selected volumes while "Deep Scan" takes longer but more thoroughly.