[Feature]: Checkbox Directory Hierarchy Selection Tree Instead of Separate Exclusions List Please

### Describe the feature you'd like Instead of adding exclusions after adding directories/folders, which is difficult to add multiple exclusion directories, at least when using the directory/folder picker pop-up dialog, it would be very great if we could just have a nested checkbox sync/backup and manual upload directory/file picker dialog, where can expand the directories that we would like to, so can uncheck the directories, sub-directories, and files that we would like to exclude, without it being an extra step, plus an extra step that is difficult to use. ### Additional context Add any other context or screenshots about the feature request.