It is happening even with clean new install, no addons.
Inıtially tested to install on D drive, it was extremely problematic. I couldn’t even copy paste my backed up airplane custom camera files in to sim folders. Even when the target folder was empty, when i tried to copy paste a file, it was saying “You wanna overwrite the current one?” (it was seriously empty folder, not a single file was there). I choosed overwrite the file option, asked me admin permissions, i sad yes. and it was giving me “You can’t do that action!” prompt. I was seeing there is a 0kb newly created file with same name on target folder. When i try to open it with Notepad++ it was giving error, file can’t be accessed. I checked my user admin permissions, all seems ok. I tried copying files to Community folders also, it was the same. winrar trick also didn’t work. I got CTDs and decided to install msfs2024 to C drive. No more copy paste issues at C drive. Sadly I got 2 ctds on C drive also, one was when quiting sim, other one was a “connection lost” crash. I don’t know what changed at last beta builds, or it is because of win11 25H2, it is really strange. It feels like there is crazy DRM going on.