I found this solution with mongodump ( meteor: how can I backup my mongo database ):
mongodump -h 127.0.0.1 --port 3001 -d meteor
mongorestore -h 127.0.0.1 --port 3001 -d meteor dump/meteor
However, I can't use these commands (mongodump and mongorestore) in my Windows 10 console (Error: typo or couldn't find these commands). Do I have to install mongodump and mongorestore first? Just want to save and restore my local Meteor.users/db.users and my App-Collection db.mycollection.