A home or mirror server sees total space (rounded up by padding) and the count, expiry and use counts of secret links, plus by construction which writer keys exist and when they write; not names, sizes, folders, thumbnails or contacts; access patterns are the planned Tor work.

A privacy claim is only credible with its leftovers listed.

Be honest about the leftovers. A home server, or a mirror, still sees some things.

How much space you use in total, rounded up by the padding.

How many secret links you have, with their expiry and use counts. And, by construction, which writer keys exist and when they write.

What it does not see: file names, sizes, folder shapes.

Not thumbnails. Not who you share with. Access patterns are the open item. The plan is a Tor hidden service.

Check yourself. Name two things the threat model says the server can see and two it cannot.