SpiderOak One and Groups have no hard limit on the size of a file that you can place in a ShareRoom or on the number of files it may contain. There are however practical limits that cause us to recommend that you limit yourself to individual files no larger than 3 GB or so. For more information, see File Sizes.
Additionally, we recommend that folders in a ShareRoom contain no more than a few dozen files each, using subfolders if appropriate to split up your files. This will improve performance when viewing a ShareRoom,