Self-host file syncing for Zotero using WebDAV
Zotero has two types of file syncing: Zotero and WebDAV. Syncing by Zotero is free up to certain capacity. For more capacity, one can pay a subscription for Zotero Storage. On the other hand, syncing by WebDAV allows one to self-host this function. If you have free space on your storage, then it is free.