PSA: Back up your saves MANUALLY

[Chilldozer]

If your game crashes or power goes out during an online PvP match, your save file will potentially corrupt itself.

This just happened to my friend earlier tonight and he lost over 20 hours of progress.

You can easily back up your save by doing the following:
Hit the windows key + R and type in "%appdata%". Click ArmoredCore6, and then copy the file inside. You can make a backup folder in that same location, just name it something different.

That's all; Just don't want anyone else to get screwed by this.
Cheers

[REhorror]

Ludusavi saves lives.

Use Ludusavi: https://github.com/mtkennerly/ludusavi

It uses the save game path straight from PCGamingWikia and you can create custom entries.