Assuming Vista or 7 (this should work on XP, 8, 8.1, and 10, as well) and that the disk is not showing up under My Computer at all: • Connect your disk. • Run cmd as an Administrator.

• Run diskpart.exe. If you need help in this program. • list disk • Find the disk that corresponds to your USB disk. Select disk n where n is the number of the disk.

Confirm that you're using the right disk with detail disk. • clean (Warning: This command erases the disk's partition information. How to download jdk for mac os x.

Step 1, Connect the USB flash drive to your computer. To do so, plug it into one of your PC's USB ports, which resemble thin, rectangular slots on your computer's housing.Step 2, Open Start. Do so either by clicking the Windows logo in the bottom-left corner of the screen, or by pressing the ⊞ Win key.Step 3, Type 'this pc' into Start. A computer monitor-shaped icon will appear at the top of the Start window. On Windows 7, click Computer on the right side of the Start window. Please note: I'm here t o use a Windows 10 based HP laptop to format my Lexar drive. If you are on an earlier operating system like Windows 7, XP, etc. The screenshots may look slightly different. For example, in Windows XP 'My Computer' is equivalent to 'This PC' on Windows 10. Step 1: Locate your USB stick under 'This PC', right click on it and select the 'Format' option.

Any data on the disk will no longer be accessible.) • create partition primary. No size is needed if you want to use the whole disk • active.

Marks the partition as potentially bootable. • format fs=fat32 quick. You can choose NTFS or exFAT instead of FAT32 if you want.

(Note: Windows 10 limits FAT32 to 4GB. I recommend using exFAT instead, which is essentially a newer version of the same format.) • assign. Assigns the disk a drive letter. • exit to quit. If you're still having problems with the disk after trying this, you might try omitting the quick from step 9 to do a full format.

That will take a very long time and usually isn't necessary, but may help uncover physical damage to the disk. In some cases you might need to re-initialize the disk. As above, this will destroy the data on the disk (or, rather, your ability to access it). To do that from diskpart.exe: • list disk • select disk n • attributes disk clear readonly. This command will unset the read-only flag on the disk.

You can see the current attributes with attributes disk or detail disk. • online disk. Sets the device status to online if it's been disabled. • convert mbr.

Converts the disk to MBR format, which will work just fine for most disks. If you've got a USB disk larger than 2 terabytes, however, you'll want to use convert gpt instead. I'm not sure if the above commands are all identical on older OSs (XP).