How to Partition a Thumb Drive

As USB flash drives get larger and larger, you may find it useful to partition them into distinct drives. This can make it easier to organize your files, or allow you to boot from one partition and keep essential tools on another. This How.com.vn article teaches you how to partition your USB flash drive using Windows 10, macOS, and Ubuntu Linux.

Method 1

Method 1 of 3:

Windows 10

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1
Press ⊞ Win+R. This opens the Run dialog window.
- Back up any data that's currently on your USB flash drive that you don't want to lose. You may need to delete that data during the partitioning process.
This opens the Windows Disk Management tool.
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3
Convert your USB flash drive to NTFS if necessary. Find your USB flash drive in the list of drives at the top of the window (you can identify it by its drive letter and size). Then, look at what it says in the "File System" column. If you see NTFS here, you are good to go! If you see FAT32, you will need to convert the flash drive to NTFS so you can partition it.^{[1]XResearch source} This will delete everything on the flash drive. Here's how to convert it from FAT32 to NTFS:
- Right-click your USB flash drive and select Format.
- Select NTFS from the "File system" menu.
- Click OK.
- Click OK to confirm that you want to erase and format the flash drive.
Each USB flash drive connected to your PC appears at the bottom with a label like Disk 0, Disk 1, Disk 2, etc. When you right-click the USB flash drive, a menu will expand, which is where you will find the Shrink Volume option.
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Enter the desired size of your new partition. This goes into the "Enter the amount of space to shrink in MB" area.
- Use the value of "Size of available shrink space in MB" as a guide to figure out how much to shrink.^{[2]XResearch source} This is the total amount of space you can divide between your partitions.
- For example, if you want to partition a 20 GB drive into two roughly 10 GB partitions, and you see 20,480 as the "size of available shrink space" in MB, you can enter half of that (10,240) into the box. This will create a new 10 GB partition.
This creates a new unallocated partition, which you'll now see next to your USB flash drive in the bottom panel.
This opens the New Simple Volume wizard.
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Adjust the partition size and click Next. By default, the full amount of unallocated space will appear in the "Simple volume size in MB" field. Clicking Next accepts that size so you can use all of the unallocated space for your new partition.
- If you want to create multiple partitions from your unallocated space, adjust the size to reflect the size of the first new partition. Then, after creating this partition, you can right-click the remaining unallocated space and restart the wizard to create the next partition.
This drive letter is how the new partition will appear in Windows.
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Select your formatting settings and click Next. By default, the radio button next to "Format this volume with the following settings" is selected, and some default options are filled in. Unless you know for sure that you need to change these options, leave the defaults intact. Once you click Next, the new partition will appear.
- If you still have unallocated space you'd like to partition further, right-click that space and select New Simple Volume to restart the wizard now.

Method 2

Method 2 of 3:

macOS

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Open Disk Utility. You can find this in the Utilities folder, located in your Applications folder.
- Before you partition your USB flash drive, it's a good idea to back up everything that's on it that you don't want to lose.
It's in the left panel.
It's the icon that looks like a pie chart at the top of the window.^{[3]XResearch source}
It's below the pie graph.
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Drag the edges of the pie chart to adjust the partition size. If you already have data on the drive, the shaded area displays the amount of space on the drive it's consuming. The unshaded area represents free space on the drive—this is what you'll be turning into a new partition.
- If you want to have two partitions that are the same size, just move the slider so that the shaded and unshaded sides are equal.
- If you want to erase the data that's on the drive, click Cancel. Then, click Erase at the top of the window to erase your USB flash drive.
- If there is no shaded area on the drive, just skip to the next step.
Your new partition will show up on your Mac as its own drive. The name you enter here will be the name that represents the new "drive" on your Mac.
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Select a file system format from the "Format" menu. This is up to you—if you want to use the drive on multiple operating systems, including Windows PCs, use ExFAT or FAT.^{[4]XResearch source} Otherwise, choose APFS, which is the default Apple file system.
- If you want to change the size of the new partition, you can enter a size into the "Size" field, or drag the slider between the partitions as needed.
Continue adding partitions and adjusting their sizes until the drive contains all of the partitions you need.
A confirmation message will appear.
This partitions your USB flash drive. When the process is complete, you can click Done to exit.

Method 3

Method 3 of 3:

Ubuntu Linux

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1
Open GNOME Disks Utility. An easy way to do this is to open the Application menu, type disk, and then click Disks in the search results. If you don't have this tool, open a terminal window and run the command sudo apt-get install gnome-disk-utility to get it now.
- If your USB flash drive is not already connected to your computer, plug it in now.
- If there is any data on your flash drive, you'll want to back it up before you continue.
You can identify your USB flash drive by the size. Make sure you don't select your hard drive instead, or else you will lose all of your data.
3
Delete any existing partitions you don't want to keep. To delete a partition, select it in the right panel and click the minus sign button. A confirmation message will appear—click Delete to confirm.
- Once you've deleted all partitions, the remaining space will be marked as "Free Space."
This opens the Create Partition window.^{[5]XResearch source}
If you only want to make one partition from the free space, just leave the default size selected, as it's the total of all free space. If you want to create multiple smaller partitions, enter the size of the first partition you want to create here.
It's at the top-right corner of the window.
Here you'll need to enter a Volume Name, which is how the drive will be identified when inserted into a computer, and select a file system type. The file system type options vary depending on your computer—the Disks utility describes the function of each in the window.
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Click Create. You will need to confirm your password at this point, but once confirmed, your new partition will be ready to use.
- If you'd like to create another partition from the remaining free space (if any), click + again to create a new partition.

Community Q&A

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Question
If my Windows 10 flash drive has several partitions and there is a memory failure in one partition, can I switch to another partition?
Marcus Huber
Community Answer
That depends on what exactly is the problem. If it's a software problem (like a corrupted file system), you can use the other partition normally and format the other to repair the file system. If it's a hardware problem, you most likely can't use it anymore.
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Question
Are flash drives partitioned this way on Windows accessible on Android?
Community Answer
Yes.
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How do I create password for a partition?
Community Answer
By password, do you mean you want to encrypt your thumb drive? If you have a PC with Windows 7 or up, you can use BitLocker.
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