If you're hosting Immich on a spare computer, using an old external disk drive, reduce your storage requirements by converting your Jpeg files to webp. Keep the .jpg extension too! You can probably get them down to about half the size of a Jpeg.
This is really only if you're exporting files from elsewhere to Immich. I export from Lightroom Classic. Don't ever go touch your original files!
for i in *.jpg
do
cwebp -metadata all "$i" -q 70 -m 6 -o out.tmp
mv out.tmp "$i"
done
@ramon yeah, that's really good too.
@ramon it's not too bad. They have a docker compose file that only needs the external storage set up AFAIR.
Docker makes it easy to install both of them.