I got to my dad's every week, I am tempted just start a routine and using a couple of 2TB Western Digital drive and update it weekly and then leave it with him, swap it round every week.
Prime Photos provides unlimited storage for photos in Amazon Cloud Drive for active Prime members in the U.S.
I use Amazon Glacier.
It's aimed at techies and their pricing structure is complex, but it's incredibly cheap for backup storage. Last month's bill for all my photos was $1.70 and that includes a few thousand transactions.
I've never hit an upload cap, my last upload went through at 14.2MB/s
Wait, scrap that, that was just filling up my 5G free limit....i just hit it.
Somebody on Talk Photography said they were able to upload raws.