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How to Fix Read-only File System to Read-Write

Updated on Dec 04, 2018 by Daisy to Partition Master

Sometimes, you need to convert a USB drive, sd card, pen drive from read-only to the read-write file system in order to use the device. Luckily, you can learn how to do it with the methods provided in this article. Don't hesitate to read it for reference.

Read Only

  • "This Word document is read-only" indicates that you're unable to make a modification you want to make to it.
  • "The pen drive comes with read-only status" suggests that you can't change what is on it. i.e. once the data is written on it, you can read it but can't do any other operation on it.

In conclusion, if data is truly read-only, you can read it with a device, but you can't modify, erase, append to, concatenate, copy, or move it. The main purpose of read-only is to control how you use the data.

Remove Read-only Mode by DiskPart Partitioning Utility

Devices and media are often characterized as read-only mode, which actually can be changed to read-write by the user for further usage. When a drive has become locked in a read-only state, try to fix read-only error with the following simple instruction.

Step 1: Click on your "Start Menu", type cmd in the search bar, then hit "Enter".

Step 2: Type command diskpart and hit "Enter". A new command line window will open.

Step 3: Type list disk and hit "Enter". (make sure your devices has been listed out, for example, it is listed as disk 0)

Step 4: Type the command select disk 0 and hit "Enter".

Now you've removed the read-only attribute from the storage devices. Type exit and hit "Enter" to leave the DiskPart utility.

Correct Read-Only Disk Error by Reformatting

What if the given suggestion does not work in your case? If so, there is an alternative way for you, which is to format a Read-only USB Drive, SD Card, Pen Drive, Floppy Disk, etc. to a proper file system with EaseUS free partition manager.

Many storage devices such as USB drives, pen drive, floppy disk, SD card, and external hard disks are preformatted with a certain file system, which may not be compatible with a Windows computer or a Mac, so you can only read it other than writing new data on it. So in this case, try to reformat it to the desired file system like NTFS, FAT, EXT2, EXT3 and so on. (Back up the important information on your disk before doing the format, because formatting a disk will erase all data on it.)

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 Windows 10 is supported


Step 1: Launch EaseUS Partition Master, right-click the partition on your external hard drive/USB/SD card which you want to format and choose the "Format" option.

Format Hard Drive Partition - Step 1

Step 2: Assign a new partition label, file system (NTFS/FAT32/EXT2/EXT3), and cluster size to the selected partition, then click "OK".

Format Hard Drive Partition - Step 2

Step 3: In the Warning window, click "OK" to continue.

Format Hard Drive Partition - Step 3

Step 4: Click the "Execute Operation" button in the top-left corner to review the changes, then click "Apply" to start formatting your external hard drive/USB/SD card.

Format Hard Drive Partition - Step 4

Smaller cluster size makes less wasting of disk space. The smaller cluster size is, the bigger file allocation table (FAT) will be. The bigger the FAT is, the slower the operating system works with the disk.