To assign a drive letter to a partition using DiskPart, you’ll first need to open DiskPart, list the volumes, select the desired volume, and then assign a letter. Once assigned, you can exit DiskPart and access the drive in Windows Explorer. 

Here’s a step-by-step guide:

1. Open Command Prompt as Administrator: Search for “cmd” in the Start Menu, right-click on it, and select “Run as administrator”. 
2. Launch DiskPart: Type diskpart and press Enter. 
3. List Volumes: Type list volume and press Enter. This will display a list of all volumes on your system, including their numbers and drive letters (if any). 
4. Select the Volume: Identify the volume you want to change and type select volume <volume number> (replace <volume number> with the actual number from the list volume output). 
5. Assign a Drive Letter: Type assign letter=<desired letter> (replace <desired letter> with the letter you want to assign, e.g., assign letter=F) and press Enter. 
6. Exit DiskPart: Type exit and press Enter. 

This video demonstrates how to assign a drive letter to a partition using Diskpart: