So I was making an SSD backup using freefilesync and before I started to sync (copy) to the other drive I noticed that my 500gb SSD was showing in the file list as having 1.15TB of files. This is strange as I do not have compression enabled on this drive... I used another program called TeraCopy to copy files over and this one correctly copied ~500gb of files to the backup folder... to check if all files were copied I used Freefilesync again and clicked compare, strangely this time it is showing as ~830GB of files missing in the backup folder.... (I have double checked the paths and they are correct)
What is wrong? It does not make sense that a 500gb drive has 1.15TB of data if this data is not compressed, should I trust that TeraCopy did in fact copied all files? Or should I go with the Freefilesync?