You can use the ext4 file system on USB drives connected to your Keenetic router.
Ext4 is one of the major file systems, used primarily in operating systems with a Linux kernel. More information can be found on the Internet: https://en.wikipedia.org/wiki/Ext4.
Compared to ext3, ext4 supports larger file sizes and is a faster, more efficient and more stable file system.
We recommend formatting a drive in the ext4 file system from a GNU/Linux distribution by the operating system itself or by using special programs and utilities for disk management.
NOTE: Important! Formatting the drive will erase all data on the selected storage volume. Be sure to copy the data from the drive before formatting.
Formatting in Linux
Usually, a GNU/Linux OS distribution has some kind of graphical utility for formatting USB drives and hard drives (e.g. in Linux Mint — USB Stick Formatter utility, in Ubuntu — Gnome Disk Utility, etc.) as well as the GParted drive management utility. You can use these tools to format a drive, or you can format it from the command line.
Here is an example of formatting a USB flash drive using the USB Stick Formatter utility.
A universal way to format a USB drive is to use the GParted drive management utility. Usually, it is already installed in an OS, but if necessary it can be installed from the official repositories (run
sudo apt install gparted or
sudo yum install gparted depending on the distribution).
Launch GParted. Select the required device in the upper right corner (you can identify your drive by label, size or file system). Unmount the drive so that you can format.
You can also format with special commands via Terminal.
One of the ways is as follows:
df command and define the location of the connected drive (/dev/sdb, /dev/sdc, ...). In our example, let's suppose that the flash drive is in /dev/sdc1.
Then it should be unmounted. You can do it using a command
sudo umount /dev/sdc1
Now, to format it into an ext4 file system labelled 'USB', execute the command
sudo mkfs.ext4 -n 'USB' -I /dev/sdc1
NOTE: Important! The ext4 file system drive cannot be used in Windows. If you need to mount an ext4 drive in Windows, you can use the special ext2fsd driver developed by the community of open-source software for ext file systems.
Formatting in Windows
As described above, formatting the drive in the ext4 file system is recommended from the GNU/Linux distribution. However, you can format from Windows if needed. For example, you can use MiniTool Partition Wizard Free Edition or Paragon Partition Manager Free.
Formatting in MiniTool Partition Wizard Free Edition:
Formatting in Paragon Partition Manager Free: