If the same content is present more than once, Fspool keeps it a single time. You use — and pay for — the space you really use.
Picture three colleagues emailing each other the same 10 MB PDF and all saving it in the shared folder. On a normal disk that’s 30 MB. On Fspool it stays 10: we recognise it’s the exact same content and keep it once, available to everyone as if each had their own copy. This is called «deduplication» — but in practice it just means we don’t make you pay for the same thing twice.
In the app, space is shown in two ways. Knowing when we use one and when the other clears up any doubt — and, above all, what you pay is always just one.
This is the number for your quota and your bill: how much you’re really using, once the repeated copies are set aside. The three PDFs in the example weigh 10 MB, not 30. This — and only this — affects your plan.
When you look at a single space, a person or the trash, we show the full size of the files in there. The same PDF shared between two spaces appears in both with its 10 MB, because it wouldn’t be fair to attribute it to just one. This number is for splitting things fairly: it doesn’t add to the cost.
That’s why, adding up the breakdowns, you can get more than the total: the difference is exactly what deduplication saves you. The bill, though, stays on the effective total.
In folders with optional encryption, every chunk is made unique and is not deduplicated. Keys are managed by the platform: this protects against the underlying storage, but it is not zero-knowledge.
The space included is effective space: deduplication works for you, on every plan.