Shelf gives you a number of options when it comes to syncing and/or importing content from your cloud accounts. Options include:
- Adding a single file
- Adding multiple files at once
- Adding a single folder (and all of the files and subfolders underneath it)
- Adding multiple folders at once
- Adding a mix of files and folders at the same time
For details on how to perform a sync or one time import, please refer the question "What are the different ways I can connect Shelf to content that's in another cloud account?"