Borrow some one else Computer and another USB stick and get them to transfer files and standard 1080p and lower jpeg images of google and google drive on to the USB stick... and give that USB stick to you...
This will show were the issue is...
You can now use the import function in share factory and then set about fixing the other device issue later...
If the OTHER images not created by you now import, its the software you used to create the image edits... Use some thing else...
If all images now import Its the USB sick you were using...
If all images import from the same USB stick drive but don't when you use the USB drive on your PC its your PC hardware/software messed up the USB stick...
Good luck fixing that it can be millions of different apps and software programs messing with the USB stick depending on what you installed...