Click on the below link and download the file "AutorunExterminator"
Extract it --> Double-click on "AutorunExterminator" --> Plug your flash drive now.
This will remove the autorun.inf files from your flash drive and also from drives.
Click on "Start" -->Run --> type cmd and click on OK.
Here I assume your flash drive letter as G:
Enter this command.
attrib -h -r -s /s /d g:\*.*
You can copy the above command --> Right-click in the Command Prompt and paste it.
Note : Don't forget to replace the letter g with your flash drive letter.
Now press "Enter".
Now check for your files in Flash Drive.
After that, download the Malwarebytes' Anti-Malware from the below link
Update it --> Perform "Full Scan"
Note : Default selected option is "Quick Scan".