Unlimited everything feels generous on day one and becomes a full disk on day ninety. Users, groups and quotas take fifteen minutes to set up now - and are a negotiation to retrofit later.
A Nextcloud with one shared login and no limits is not a cloud, it is a future argument. The day-one pattern is simple: one account per person, people organised in groups, and a quota on everyone - including a default quota so the next account you create is born with limits. Here is the setup, with example numbers labelled as examples.
From the admin account, open the Users page and create an account for every real person. Never a shared family or team login: separate accounts are what make sharing permissions, deleted-file recovery, activity history and quotas mean anything, and they are what let one lost phone be cut off without locking everyone out. While you are there, create your own daily account without admin rights if you have not already - the hardening guide in this series explains why the admin account should not carry daily files.
Create groups that mirror real life - family, accounts team, field staff, whatever fits - and put each person in theirs. Groups feel pointless with three users; they pay off the first time a folder must go to the whole team in one share instead of five, or a policy (like two-factor enforcement) should apply to a whole category of people at once. Sharing to a group also means the next person who joins the group quietly gets the folders they need.
In the Users page settings, Nextcloud offers a default quota applied to new accounts. Set it before creating everyone - a number your data disk can honestly afford divided by the number of people, with room to spare. Then adjust individuals: the photographer or the accounts desk with the big archive gets more, the light user keeps the default.
Quotas are per person in that same Users list - one click on a user shows their usage bar against their limit, which is also your early-warning display.
New admins are surprised by the gap between files a user can see and space they consume. Two quiet eaters live in every account:
Both are features, not bugs - they are how accidents get undone. Just know they are why a 200 GB disk does not hold 200 GB of visible files, and leave headroom for them in your quota maths.
Once a month, open the Users page and read the usage bars. You are looking for two things: anyone nearing their quota (raise it deliberately or have the clean-up conversation early, not at the error message), and total growth that says the disk plan needs revisiting. That is the whole routine - the quota system does the daily policing, you do the monthly steering.
The one-step install first - then these fifteen minutes of user setup on top.
Watch Full VideoUploads and sync for that account start failing with quota errors until space is freed or the admin raises the limit. Nothing is deleted automatically - it is a wall, not a shredder - which is exactly why the monthly check matters.
No. Every account sees only its own files plus what has been deliberately shared with it or its groups. The admin account manages users and settings; it does not browse people's private files from the web interface.
Start from the disk, not the people: total data space, minus a reserve for versions, trash and the system, divided by the number of users. On a 1 TB data disk for five people, something like 100 to 150 GB each leaves sane headroom.