My Casio fx-9750GIII is not accepting file transfers of addins and other files over USB. On the Chromebook that I am currently using, it fails to transfer the file with "Copy operation failed. The file or the directory is not usable." If I remember correctly, I was able to transfer addins before with this Chromebook, cable, and calculator. I have tried fully resetting the calculator and restarting the Chromebook. The add-ins I have attempted to transfer are Ftune3, χCAS, and an fxSDK default new project program I compiled a few days ago. I remember having this issue before, but do not remember how it resolved, or if it just went away. I can try to use my PC when I get back home in a few days. I am able to transfer programs (g1m), but not add-ins (g1a) or backup files (g2m) generated by this calculator. I have tried both F1 for USB Flash on the prompt immediately after plugging the USB in, and RECV (F2) in the Link app.

I was able to transfer the files just fine from my personal laptop. Still, I feel as though I remember being able to transfer the files with my chromebook at some point. I also do not know what is causing this.