I've been having problems with storage on my laptop for over a year now, I've emptied the trash bin constantly for a while now, I've uninstalled almost every program that I don't use regularly, almost all my files are on the cloud already, but I seem unable to get over 15 GB of free storage.

Today I was anylizing my disk with TreeSize, and found that the folder file:///C:/ProgramData/Dell/SARemediation/SystemRepair/Snapshots/backup/ is using 85.2 GB (which is about a third or my storage space). This file seems to contain a few hundred files of about 100 MB. Is this folder important? What does it contain? How can I reduce its size?