Previously I had been using an earlier version of OpenWrt (15.05.1) but I wasn't able to update the opkg lists so I updated to the newest version (18.06.04) which has (supposedly) taken up the entire flash drive of my little HooToo Nano...
However, I don't believe it really took up all the space...
LuCi says:
Installing luci-app-openvpn (git-19.317.29550-ef819b5-1) to root...
Collected errors:
verify_pkg_installable: Only have 0kb available on filesystem /overlay, pkg luci-app-openvpn needs 9
I don't know what to believe but I think it's strange it's precisely 0% available...
I know I can connect a USB but it appears in my situation I'll have to rebuild the ROM to flash on there which seems daunting.
Just want to confirm if I really have no space to try to install what I want (a VPN software so I can use it to broadcast a VPN connection over wifi)... supposedly only 9kb...
"Designated Driver" -- not release firmware -- that was the name before the LEDE split, which produced v17. You definitely should upgrade as (a) there are multiple, severe, well-known, actively exploited security vulnerabilities in that kernel, third-party firmware, and even 802.11 protocols themselves, and (b) there likely aren't going to be package repos that match what is either an OEM build or a non-release snapshot.