
Paper
I'm interested to know how are photo thumbnails stored, is a thumbnail cache stored in S3? Or is it local only and therefore requires downloading all photos beforehand? (edited)
We load full file version and keep it in a local thumbnail cache. Yes it does require downloading all photos beforehand.
In our legacy photo backup product, we've been generating thumbnails the moment when photos were backed up. We plan to implement this feature.
Since S3Drive supports also existing file systems we would have to implement a process to generate thumbnails for existing resources, this would require fetching full image locally anyway (I mean we could offload to the back-end, but this would go against the E2E encrypted privacy model), so we haven't rushed this. (edited)