QuickBooks Enterprise 21

QuickBooks data files larger than 500MB need to be optimized every 6-12 months to ensure they run at top performance. There is no internal functionality in QuickBooks to optimize the data file other than running a condense. The optimize operation will copy all data into a new data file, remove unwanted temporary data, and audit trail data to bring down file size by 25-40%. This will improve the performance and stability of the data file. You can purchase this service for a 3rd party provider.

Another option, you can use the Condense Data utility to lower your file size.

https://quickbooks.intuit.com/learn-support/en-us/help-article/data-utilities/use-condense-data-utility/L7zprPIcj_US_en_US?uid=lep88x9o