128GB Ultra 3.0 now only has a capacity of 31.9GB. How to fix? What caused problem?

ScanDisk Flashdrive:  128GB Ultra 3.0 now only has a capacity of 31.9GB. 

Two Questions:

1.  How to fix? --Restore to correct 128GB capacity

2.  What caused problem?  How did this go wrong, what caused it to lose capacity?

Thanks

Hello, 

in that case you can format it with hp tools that will restore the full capacity of the drive

here you can download it 

http://filehippo.com/download_hp_usb_disk_storage_format_tool/