I can't open my file. It says It may have been damaged.

I was working on my 1.3 mb file i'd been working on for months and all of a premiere started glitching out and I couldn't read anything. I closed the program and when I tried to reopen the file, it kept saying "File won't open. it appears to be damaged." The the autosaves gave me the same message. I tried importing the file into new project and not only did it not work, when i cloed and reopened said new file, I recieved the same message. The file is currently sitting in a 1 terabyte flashdrive. Idk if this had anything to do with the file size  (i started making a good number of nested sequences) or it has something to do with the flashdrive. (I created a new folder and put some photoshop files into it, then when i opened it minutes layer it was gone. I'm really desparate here and just hoping someone has a solution because I'm looking at another weeks worth of work on something I thought was only going to take another day to finish. Any answers are highly appreciated.