My only viable backup strategy for Windows so far is to use the File History option in the Control Panel to create incremental backups of my system. There are two issues with this approach with regard to using it for migration:

1. Not all directories to be backed up are accounted for. I've set the backup so that only the most important files in the default directories are saved in case something happens to the system. I could consider manually including the missing entries if not for the second issue:
2. The backups can only be read within the File History menu. The backups themselves are stored in a semi-gibberish manner so it is impractical for me to have it read in Linux, unless there is already a solution for it. Otherwise these backups force me to continue using Windows.

I understand the importance of backups and regularly practice doing so, even if not to the fullest extent. However this scenario is different, where I am actively migrating all my data to a different platform. I need to make sure no data is left behind in the process, including data that I normally don't back up separately, like user configuration for applications or game saves.

What I am looking for is a program that readily makes my Windows data ready for migration to Linux by fetching the files from directories where user data and application data is stored and stores it in a platform-agnostic manner in some external location.