My C Drive has only 20 gb free, but every time I start up arma, al 46 gb ofl my mods from my secondary hard drive are trying to redownload to my C Drive.
when I try to delete them from the C drive they just start downloading again, and now they all show up as corrupted in the mod section of the launcher
This didnt happen until the newest steam update, there is also a thread on the arma subreddit of others having this issue.