Hello,
I bought a new SanDisk Extreme 256GB USB stick from ebay and checked it with CrystalDisk and it shows the Health Status as "100% bad", focussing on two bits:
E8 Spare Blocks Remaining is Current = 0 with Worst = 100
E6 Percent of Total Write/Erase Count” Current = 100 and Worst = 100...