In a moment, AOMEI Partition Assistant Standard will restore your pen drive to its full capacity. If no problem, click “ Apply” to apply the operations. If there is something wrong, you can undo any operations as it has made no changes to your disk. Preview partition status after the operations. You can also change the partition size if needed.ĥ. In the pop-out window, select the drive letter, file system and click “OK” to continue. Right click on the unallocated space and select “ Create Partition”.Ĥ. Within its main interface, right click on the pen drive and select “ Delete all Partition” and click”OK” in the next pop-out window.ģ. Free download this tool, install and open it.Ģ. With its intuitive interface, you can easily manage it yourself.ġ. Solution 2: using Partition FreewareĪs a freeware for Windows 10/8/7, AOMEI Partition Assistant allows you to fix the pen drive showing 4MB problem effortlessly. The free partition manager AOMEI Partition Assistant Standard is one of best choice. If you are not familiar with all these commands, you can also use third-party software that has an intuitive interface to do solve this. Then you can assign a drive letter or format the pen drive if needed. From here, Diskpart will restore pen drive to full capacity. In a moment, Diskpart will create a partition. Type” create partition primary” to create a new partition on the pen drive. Type 'clean' to remove all the data on the pen drive. Type “list disk” in the command prompt to list all the disks online.Ĭhoose your pen drive by typing the command “select disk ”. Type “diskpart” in the Run box, and press Enter to get the Diskpart tool. Before you try this method, make sure there are no important files on the pen drive because it will cause data loss.Ĭonnect the pen drive that is missing space to your computer. There is a simple way to recover the missed space on your pen drive with Windows built-in utility Diskpart. If a 16gb flash drive only shows 2mb, do not worry. Writing operating system (OS) like Linux to the pen drive. Unplugging the pen drive suddenly when it is in use. There are many reasons that can lead to a pen drive showing less space than actual. Besides 16GB, pen drive with less or more capacity may also loss a large amount of space after unexpected changes made intentionally or not. The often met problem with pen drves is that an USB pen drive 16GB shows 4MB. Pen drives are very convenient for data storage, but they can be damaged easily.

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