kCFErrorDomainCFNetwork 301 on Strato HiDrive -WebDAV

[BLUEFROG]

Why are you using CloudKit (or previously HiDrive) instead of a sync on your local network?

See…

Sync Types Explained

First Questions Sync is simple but you need to choose the type of sync method to use. Regarding syncing, the first question you need to ask yourself is, “Do I need a remote sync option?”. Consider these questions… Do you need to sync between machines – especially desktop Macs – in different geographic locations? Do you have a colleague, assistant, significant other, etc. that needs frequent updates to synced data? Are you using a shallow sync, i.e., Download Files: On demand in DEVONthink To …