I want to install VPN but there is no "Free space". How can this problem be solved?
root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 2.3M 2.3M 0 100% /rom
tmpfs 250.0M 756.0K 249.2M 0% /tmp
/dev/ubi0_1 24.0M 24.0M 0 100% /overlay
overlayfs:/overlay 24.0M 24.0M 0 100% /
ubi1:syscfg 29.6M 288.0K 27.7M 1% /tmp/syscfg
tmpfs 512.0K 0 512.0K 0% /dev
/dev/sda1 1.8T 140.6G 1.6T 8% /mnt/Bkup
type or paste code here
Please help!