@phenomlab yes, NEDB is no longer maintained, I haven't found a replacement for it yet, but, I've used it recently to develop a chrome extension and it worked 100% without issues for me. I could look for another mongodb replacement that has persistent file storage. Doing some more research about this I guess it's not as simple as I was thinking, I guess there can be issues with "mongo api level". I found Tingodb which I think is still active, and supports mongo api 1.4... shoot nevermind, it looks like that one is abandoned too. Guessing this is just not feasible and I'd need a real mongodb server.