Actually, @TrystanLea a comprehensive guide on upgrading an SDCard would be fantastic. I cannot remember what is out there right now.
My current advice would be
You are running an older setup. My advice is to upgrade to the lastest version. emonSD-17Oct19 release
To do this;
- get a new SD Card (you can always put the old one back in if there is an issue)
- download & flash a new EmonSD image emonSD pre built SD card Download & Change Log · openenergymonitor/emonpi Wiki · GitHub
- take a backup of the existing system. You may need to clone GitHub - emoncms/backup: emoncms backup module and do a manual export.
- install the new SD card & power up
- wait, wait, wait, make a cup of coffee, wait, wait, wait… (lots of updates etc)
- import the backup