http://z5lcip2ba3ec6v5za5snjzncpvr6ocyvqnkox2alerut6ruozpjtvkqd.onion/misc/catalog
Free cloud storage in highly encrypted containers is probably easier than NAS, and not publicly visible as torrents (even if it ends up in a data aggregator's hands, they'd never distribute it to the public because that would cost money. In fact, they're unlikely to keep it if it's a big encrypted container), but unreliable because companies come and go and can just drop free services without notice.