Do we need to upload multiple files in one go, or can they be added one by one?

Both approaches are supported. RoB Master accepts single file uploads as well as multi-file batch uploads. You can choose to upload all files simultaneously in a single batch, or add files one at a time, whichever approach is more convenient for your workflow. In either case, please ensure that each individual file does not exceed 20 MB, and that the total number of files per batch does not exceed 30.