I have disabled the BetterBibtex option to automatically export bibtex files per collection. This option was consuming too much memory. How can I export on demand?
Pull export is just on-demand export. If you compile locally, and you have Zotero running, and you use biblatex, you can use this on-demand export instead of automated export, but it will export for every single compile of your document. Whether this works better for you than automated export, I don't know.
Upgrade Storage
BBT also has pull export: https://retorque.re/zotero-better-bibtex/exporting/pull/