Reply to Database purge file #98239

https://thebrain.zendesk.com/agent/tickets/98239

Hello William,

First, please accept my sincere apologies for the long delay in getting back to you. You’re absolutely right, your question deserved a timely and thoughtful response, and it’s on us that it slipped through the cracks. We’ve been handling a high volume of requests recently, but that’s no excuse for leaving a long-time customer like you waiting. I genuinely appreciate your patience and the respectfulness of your follow-ups.

To address your original question directly:

The reason your .brz backup files continue to grow even after deleting thoughts is because TheBrain’s backup process captures not just current thought data, but also internal indexes, cached previews, and metadata structures that aren’t immediately compacted when you delete content.

A few key points:

The database keeps reserved space for performance. So even after deletions, the total size won’t shrink immediately.
Each new backup file is a full archive, not a differential one, it includes indexing and metadata that can expand slightly as TheBrain reorganizes data internally.
Minor daily growth (30–60 KB) is perfectly normal, especially with a 40,000+ thought Brain.

To fully clean up your data, you can try the following steps:

In TheBrain, go to File › Utilities › Data Integrity Scan (you’ve already done this, which is great).
Next, run File › Utilities › Rebuild Index again.
After that, create a fresh backup via File › Backup to Brain Archive, and note the size difference.

If you’d like to completely refresh the Brain structure, another option is to create a new Brain and use File › Import › Brain Archive (.brz) to rebuild it from the current one. This recreates the database cleanly and often trims hidden overhead.

Your 80 MB archive size for 44,000 thoughts is well within a normal range, but we’ll gladly help you monitor it if you notice unusual growth.

Thank you again for your patience and for being with us all these years. I truly appreciate your loyalty and understanding.

Best regards,

John