SanDisk UltraFlair USB 3.0 64GB not showing up on my laptop

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My newly bought USB stop showing up on my laptop ever since I used it for the first time. I was transferring files to my laptop (window 10) and after a while, it says that my USB is running out of space which is not true considering the files I transfer are only 50+ GB while the USB is supposed to have 64GB space. After that, my USB just disappear from the laptop. I tried plugging the USB on different USB ports and different laptops, it does not show up as well. I could not find the USB in the device manager and disk management too. I have tried everything I know, need help now. Thanks!!

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I couldnt find my usb in BIOS setup, i have plugged in my usb

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Unplug the USB drive, reboot the system, plug the USB drive back in. Does it show in Disk Management? Does it have a drive letter? If not assign one. Run a chkdsk command for the drive. If you are unable to run a chkdsk command for the drive return it to the seller for a replacement.

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it doesn’t show in disk management sadly :frowning:

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Try a different USB port, try a different computer. If it fails to show return it to the seller for a replacement. Or return it to SanDisk for a replacement but doing so takes longer.

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Tried both before, doesnt work, guess i will have to bear with the loss since i bought it through tesco online delivery

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SanDisk replacements are free. They just take time.

Return Material Authorization (RMA) process (sandisk.com)

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It sounds like your USB drive is either dead, counterfeit (fake capacity), or has a severe corruption issue. Since it doesn’t show up in Device Manager, Disk Management, or any other PC, here’s what’s likely happening and what you can do:

1. Counterfeit USB Drive (Most Likely)
Many cheap USB drives report fake capacity (e.g., shows 64GB but actually has only 8GB). When you exceed the real storage, the drive corrupts and becomes unrecognizable.
You can use H2testw (Windows) or F3 (Mac/Linux) to test real capacity.

2. USB Controller Failure (Hardware Dead)
If the USB doesn’t appear in any PC, even in Device Manager, the controller chip may have burned out. Try plugging it into a different PC or a USB 2.0 port (sometimes USB 3.0 ports cause issues).

3. Corrupted Partition Table (If It Shows Up in Disk Management)
If the USB appears as “No Media” or “Unallocated” in Disk Management, it may be fixable:
Open Disk Management (Win + X > Disk Management). If the USB appears, right-click and delete all partitions. Create a new partition and format it as FAT32 or exFAT.

You can refer to this guide for more possible solutions:

If the USB doesn’t appear anywhere (Device Manager, Disk Management, other PCs) → It’s dead:

  • If it was a cheap USB, it’s likely counterfeit > Replace it.
  • If it was a reputable brand > Contact warranty support.
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Several factors could prevent your BIOS from detecting your hard drive on a Windows PC, including:

  • A damaged or improperly connected data cable

  • A disabled hard drive in BIOS settings

  • A corrupted Master Boot Record (MBR)

  • Issues with disk drivers

  • A faulty or damaged hard disk

  • An uninitialized hard drive

Fortunately, there are effective troubleshooting methods available. Before attempting any fixes, it’s wise to perform data recovery on the undetected hard drive to prevent potential data loss.

Here are some steps to try:

  1. Check the USB Cable and Ports
    Test whether the connection is the problem by trying a different cable, switching to another USB port, or connecting the drive to another working PC.
  2. Enable USB in BIOS
  3. Update the Disk Drivers
  4. Run CHKDSK to Repair the Hard Drive
  5. Rebuild the Boot Records

If you need some instructions, this post should be helpful: [Proven Methods]Hard Drive Not Showing up in BIOS

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Hey, just a heads-up — a “64GB” USB doesn’t actually have 64GB of usable space. You usually get around 59GB because of how storage is calculated.

There are several ways to solve the ‘USB drive not showing up’ issue. Try buying a new front USB audio I/O input/output control panel board/card and see if that helps.

By the way, did you buy the USB from the official brand or a trusted store? Some cheap or fake ones tend to fail really quickly. If it still doesn’t work, I’d just recommend grabbing a new one.