How to open and check in Disk Management:
How to fix the USB not recognized issue? You need to reinstall the USB device driver -> assign a letter to/create a new partition on the flash drive. If your USB device is not recognized but appears & becomes unallocated space in Disk Management, the outdated USB driver should be blamed for. You should open Windows Disk Management to check. Sometimes, your USB flash drive may be detected but not showing in Windows Explorer. Method 2: Check USB Flash Drive in Disk Management
Disconnect and re-connect the drive to install the driver properly. Click on the Action menu and select Scan for hardware changes.Click on the Uninstall button in the pop-up window.Right click on your device and choose Uninstall Device.Find your USB device (it may be marked with an exclamation point or shown as Unknown Device).
A 3TB disk drive in a legacy BIOS and Window system will need a DiscWizard device driver to access the full capacity of a 3TB disk drive. Windows operating systems that boot from an MBR are therefore limited to 2.2TB per MBR. The MBR Partitions can define a disk drive capacity up to 2.2TB. This type of BIOS uses a Master Boot Record (MBR). Most legacy systems built before 2011 have a traditional PC BIOS.