SANDISK ULTRA® DUAL USB DRIVE 3.0 32 GB drive now showing only 128 MB

I HAD THE SAME PROBLEM.HERE İS HOW I SOLVED: TYPE  “CMD” İN THE SEARCH BOX, THEN OPEN AS “administrator”, THEN WRİTE “diskpart” AND PRESS ENTER,THEN WRİTE “list disk” AND PRESS ENTER, WRİTE "select disk…(your disk number) AND PRESS ENTER.THEN WRİTE “clean” AND PRESS ENTER. AFTER I DİD THAT, I GOT ERROR,IT DİDN’T FİNİSH CLEANNING,ALTOUGH MY USB APPEARRED ON PC WITH 0 byte.AFTER THAT YOU DOWNLOAD  “HP USB Disk Storage Format Tool” THAT PROGRAM FORMATS YOUR USB AND THAT’S IT.ENJOY.