QuickBooks 2019 (Pro/Premier/Enterprise) adds a new feature that will help reduce your file size.
With this new feature, you now have the ability to remove just the audit trail.
REDUCING YOUR QUICKBOOKS FILE SIZE – REMOVE ONLY THE AUDIT TRAIL
You can quickly find this feature via File > Utilities > Condense Data.
Once there, you’ll see this screen:
Please note – once you click Next, QuickBooks automatically takes you into the condense/archive process. No further screens or confirmations will be made.
BE SAFE – CREATE A BACKUP FIRST!
Before beginning the condense, it’s a great idea to make a backup copy of your QuickBooks data file. That way, you’ll have a spare “just in case”. You’ll also be able to look back into the details of that file if needed at a future time.
You can easily make a one time backup via File > Backup Company > Create Local Backup. This would be on top of any automated backups your system or network may already be making for you.