We have migrated back to Odoo.sh from on-premise solutions.

As we license directly via Odoo, the ease of support and peace of mind when it comes to infrastructure management is ultimately worth the cost.

However, we are hesitant to use some of the apps such as 'Documents' as I know this will blow the size of our FileStore out very quickly. Currently our instance is 80GB x 3 + 1 Staging which makes us very close to needing a dedicated solution already (400GB) which is simply not justifiable for storage alone.

Are there any working S3 attachment storage options supported by Odoo? 

Wasabi for instance is just a few $ per TB.