Hi,

Pen drive not showing data but using space is one of the main reasons for data loss disaster. It usually prevents you from seeing your data while checking the used space and unused space is showing correctly. And the most possible for this issue is a virus attack. Some unknown virus can not only infect your files but also makes them hidden. It creates an empty shortcut of your files and folders which lead to nowhere.

Follow the two methods below to fix the error and restore data:

Method 1. Unhide files using CMD while pen drive not showing data

1. Connect the USB pen drive or flash drive to PC. Open Windows Explorer > Go to Tools > Folder Options > Go to View Tab > Check "Show Hidden Files". This will make sure that the files and folders are not in hidden mode.
2. Next, click on Start Menu -->Run --> Type cmd and press Enter. To make the pen drive data showing, type the commands: attrib -h -r -s /s /d k:\*.* and press Enter. Here, you need to replace "K" with your pen drive letter.
Now all your files will start showing in your USB flash drive or pen drive. If you see a folder without a name, rename it to recover its data.

Method 2. Recover files with EaseUS recovery software when pen drive not showing data

If the above steps failed to help, then try to retrieve your data with EaseUS disk data recovery, a popular third-party data recovery software. It performs well to recover shortcut files or hidden files from USB pen drive or flash drive. Here, if pen drive data not showing due to the virus, you should first scan your USB device for viruses to removes the virus.

I hope this helps.

Regards,
Lokesh