https://github.com/kd2org/karadav
Nextcloud client/app compatible WebDAV server with a lightweight file browser webUI, and multi-user support.
Should be the closest thing to Google Drive without actually running Nextcloud.
The only issue is it looks like the Nextcloud iOS clients don't work.
How much current you get is just related to how much current the cells, wiring, and connectors can handle.
It's very easy to get 2HP or 1500W from a 56V battery, that's only about 27A which is very little and works through small 12AWG wire. Most lawn care 2 strokes are around 1-2HP anyways.
The run-time is a different story though, when you only have something like a 400Wh battery, drawing 1500W is going to last about 15 minutes.