Error starting master database on storagenode: database: secret opening file "config/storage/secret.db" failed

[Alexey]

@Aka985

What is a best frequency of defragmintation?

the default one, which Windows configure automatically.

@Aka985

On pic below, node shows 8.04Tb used, but in properties it is 8.74.

1. different measure units (the node uses SI measure units (base 10), Windows uses binary measure units (base 2), but shows them wrong - it should be 8.74 TiB, not TB), so you have 9.61TB used in SI units
2. Likely filewalkers have had errors or you have corrupted not only this database,
   see Disk usage discrepancy?

Disk usage discrepancy?

No. They will affect each other and you will have even higher discrepancy, but now because of concurrency of multiple nodes for the single resource - your disk. The fix likely would be implemented before you fill 22TB.