When does a USB drive/SD card need cleaning?
USB flash drive and SD card are two kinds of storage devices that often used in
modern life. But as time goes by, sometimes they don’t work quite right, which leads
to wrong capacity or anything else. In such case, to clean USB flash drive/SD card
is one possible solution. It means to completely wipe the entire data you select so
that you can use the devices normally again. The following article will introduce 2
ways to clean a USB flash drive/SD card under Windows PC system. Since the process
is going to erase all things on the drive, you’d better back up those important data
in advance. Here, AOMEI Backupper can realize it.
How to clean?
By Diskpart
Step 1: Connect the USB flash drive/SD card to your computer.
Step 2: Search “Command Prompt” in the Start menu. Right click its
shortcut and select “Run as administrator”.

Step 3: Type “diskpart” → Enter.

Step 4: Type “list disk” → Enter. It will show you disks connected
to the computer. Because this USB is 7GB in size, it comes that “Disk 2” is the USB
flash drive.

Step 5: Type “select disk #” → Enter. (Replace # with the number
which is identified as USB in your computer.)

Note: Be careful when entering the number, otherwise everything on
the disk you choose will disappear.
Step 6: Type “clean” → Enter to perform. Later, when you see
“Diskpart succeeded in cleaning the disk”, which means clean operation is done.

However, using Diskpart to erase USB drive/SD card takes a certain risk, especially
for people who are not good at computers. It is inconvenient to distinguish which
disk is exactly the USB flash drive/SD card. And if typing something wrong in the
command window, no one could guarantee what will happen next. So a third-party
partition freeware - AOMEI Partition Assistant is recommended here. It’s much easier
to operate even for a green hand.
By Free AOMEI Partition Assistant
AOMEI Partition Assistant is a freeware designed for better partition management.
Among many advanced features, “Wipe Hard Drive” is able to clean the USB flash
drive/SD card thoroughly. Once it be carried out, no software can recover those
data. Thus, remember to back up important things first.
Step 1: Download and
install this program.
Step 2: Connect the USB flash drive/SD card to your computer. Launch
Partition Assistant.
Step 3: Right click the removable device. Select “Wipe Hard Drive”.

Step 4: Specify the number of times to wipe if you want.

Step 5: Click “Apply” for final execution.

Compared with Diskpart, AOMEI Partition Assistant makes it handier to clean USB flash
drive/SD card, doesn’t it? You don’t have to agonize over whether you find the right
USB flash drive/SD card or not. You don’t need to worry about one mistake that
causes data loss because before clicking "Apply", you can revoke at any
time. And apart from the external device, it’s also capable to manage your internal
hard drive.