I am trying to find backup software to use on my wife's Windows 10 system. I used to use Iperius until I realized that they don't delete files in the backup that no longer exist so when I restored the files I got back a bunch of crap I didn't want that was long since deleted because it had just been adding to it and adding to it but never getting rid of deleted junk. My needs are an incremental backup that will delete a file in the destination if it is no longer in source. Two bonus points would be if the program stored the backup as files not in an image so that I could leaf through it if needed and if it were open source. I have tried several programs so far that didn't meet my needs such as URBackup, Iperius, Duplicity and Duplicati 2. I thought Duplicati 2 would be suitable until i did a test backup last night and it only backed up 138GB of her 262GB of data for some reason so that won't work for me. I don't mind if the program costs money so long as the license isn't horeshit like a one time download and then I have to pay again.