Most of these are usable on any version of the A-10, since they use the same mapping and template. First up is an old skin, a Ferris Splinter skin:
Now available: https://www.digitalcombatsimulator.com/en/files/3344714/
This is a catchall thread (since the aircraft is small for texturing, so I'll just group my skins on this topic:
L-39 Desert Splinter Skin (in the process of being approved as I uploaded it):
https://www.digitalcombatsimulator.com/en/files/3344708/
Granted I flew a single ship A-10C II I had no issues with the map so far. I mean yeah the more complex the mission and other factors may affect FPS, there wasn't any noticeable hit on FPS, even at low-level. So yeah, it works fine on my rig so far.
OneDrive will automatically back up files that it's set to upload to the cloud. I've had game files and so on sent to OneDrive, but never emails. I'd suggest you delete the stuff, your Outlook will be fine.