Now, Type “diskpart” in the ‘Run’ dialogue box and press ‘Enter’ to open Diskpart. Open ‘Run’ prompt box by using Windows Key + R.

At first, attached the USB drive you are having an issue with to your Laptop.

If you are habituated of using Windows Command Prompt, then you can use diskpart command to fix the unallocated disk space problem of your USB drive. # Method 1: Recover Lost Space on a USB Partition by Using Command Prompt In this tutorial, I’ll show you the exact method to recover unallocated USB drive space with Windows command prompt and two other methods to recover those unallocated disk spaces permanently. Unallocated space if there is any on the external drive can be displayed from here.

To see the unallocated drive space, you need to visit the Disk Management section from your computer (via Control Panel) and get the detail of each and every partition there including connected corrupted external USB drive. In this tutorial, I’ll show you the exact method to recover unallocated USB drive space with Windows command prompt and two other methods. Such unallocated disk space is unusable and until you allocate the disk space, you can’t make use of the space. This is called unallocated disk space to any hard drive including the external drive. Suppose, you are using a 32gb external USB flash drive and it shows only the disk space of few MB. Many of you might notice that the pen drive or USB flash drive does not show the entire disk space what it should be.

Pen drive not showing full space