The above question isn't unique but was always asked from our customers, you can even find many people asked same in Microsoft community forum about how fix Pen drive/USB flash drive/SD Card shows 0 bytes error.
2. Right click Start Menu in the left-bottom of your desktop, run Command Prompt (Admin), type: attrib -h -r -s /s /d H:\*.*, Tips: Change H to other drive letter of your USB flash drive.
3. Recover data from USB flash drive shows 0 Bytes with Bitwar Data Recovery.
How to recover data with Bitwar Data RecoveryStep one. Download and install Bitwar Data Recovery and then launch the software.
Step Two. Connect your Pen drive/USB Flash Drive/SD card with computer, and then choose your device that the name starts with hd and then click Next.
Step Three. Select all file of types and then click Scan.
Step Four. Double-click to preview the files and hit Recover.