The premium providers scrape your debrid accounts to see if it contains useful streams from previous downloads. Most premium services download files to their servers which you can access at a later stage. This is useful if you want to watch all episodes from a single season pack, or resume a movie that your started at an earlier time. Not all debrid services allow you to store files on their servers.
Also note that Gaia has settings for some debrid services to automatically delete old files from your premium account in order to free up storage. If you want to keep files after watching, please adjust the settings at: Gaia → Tools → Settings → Accounts
Last Updated: 06 Jan 2018