I'm currently researching the cheapest off site backup system and it looks like leaving a hdd at a friends house is the best option. The only thing I am stuck on is how to access it remotely. I need a system on a chip that I can plug in to the hdd and Ethernet and that provides ssh access. My first thought was a raspberry pi with a sata to usb cable but since I will only be doing weekly backups it makes no sense to keep the drive spinning 24/7. I need some way to turn off the drive and then back on over the internet. From what I understand there are linux programs that can do it but only directly over sata because the command doesn't work on usb sata controllers.

What I need is a cheap linux SoC that has sata and ethernet. Does anyone have any ideas?

I've been trying to find a small capacity (64GB or less) flash drive with decent read and write speeds, but haven't been able to find anything. I'm looking for something in the 200-300 MB/s read/write range, but I can't seem to find anything that reliably breaks the 100 MB/s mark even in larger capacities. The SanDisk Extreme Pro 128GB seems to have adequate performance, but at $65 is a bit out of my price range since I'd like to purchase a handful of drives.

Does anyone know of any other smaller flash drives with SSD-level performance?