wasn't it capped at 3tb? is the drive swappable to something bigger? They discontinues them in 2018, the wifi in them is old, single disk (no raid).. better to just pick up a multidrive nas or use cloud backups. What we should be asking for is timemachine backends for cloud providers.
It's not "officially" supported, but iFixit has a guide for swapping the drive on a time capsule. I used mine with a 4TB drive for years with no trouble.
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