Connect the device to the Personal Computer
Connect the data cable to the computer and wait for the windows to detect the device.
Select the USB Storage option
In your cell phone/tablet tap on the USB storage option. This option may vary slightly depending on the version of your Android.
Browse to find the memory card
In your computer, double-click on my computer icon in the home screen. There will be a new data storage device present under removable storages.
Defragment the device
Right click on the removable memory device and click properties. If there are two removal drives added; the Android system partition will be the one with the smaller drive letter. Click on the tools tab in the properties menu. Select the option “Defragment Now”. The tool will pop up and then ask you which device to defragment. Select the Android disk from the list and click on “Defragment Disk” to start the defragmentation.