It might also be a good idea to show hidden files before the backup. Some apps create hidden folders in MyDocs that may not show up unless you switch the file manager on your PC (Windows Explorer, Thunar, Nautilus...) to show all files. If you don't copy those, you may lose a lot of data (maps come to mind).

Sorry if this seems obvious but judging by questions some people ask, it may not be obvious to everybody.