I've always backed up my photos with a custom database to Google Drive so I could access any of them at a moment's notice from my iPad or iPhone on the go. I've done this to be able to submit photos to stock websites when special requests are made for a specific picture.
I've considered instead making Lightroom my primary database and backing up catalogs every year or so in the Creative Cloud. However, Adobe only offers 20GB. If that fills up will I need to move old catalogs to a different cloud?
Also, does the Lightroom feature that syncs to the iPad work inside this 20GB limit? Meaning I can only view up to 20GB of photos from my iPad at a time?
Thanks for clarification,
Most versions of Creative Cloud include Lightroom Mobile access. It uses its own storage separate from what is included with Creative Cloud. I think the storage amount is unlimited so long as you maintain your membership. Its storage is for images themselves not a LR catalog. This FAQ might help too: Adobe Lightroom mobile – FAQ