Mount disk on OpenWRT

Prerequisites

Sufficient free USB port and a supported storage device (e.g., USB flash drive, SSD)
SSH or terminal access to your device

Install required packages:

opkg update
opkg install block-mount e2fsprogs kmod-usb-storage kmod-fs-ext4

1. Identify your drive:

ls -al /dev/sd*

2. (Optional) Format the drive (WARNING: erases all data!):

mkfs.ext4 /dev/sdb

3. Create the mount point:

mkdir -p /mnt/data

4. Mount the drive manually (for testing):

mount /dev/sdb /mnt/data
df -h /mnt/data

5. Configure automount at boot:

Detect and import block devices:

block detect | uci import fstab

Set the mount point in fstab:

uci set fstab.@mount[-1].enabled='1'
uci set fstab.@mount[-1].target='/mnt/data'
uci commit fstab

Mount all drives now and on future boots:

/etc/init.d/fstab boot

Check if the drive is mounted:

df -h /mnt/data