QB Issue Resolution:

Delete it. It’s an index / throw away file and will be recreated when you reopen the QB company file.

To control its size, backup routinely with the ‘full verification’ option.  This clears the file’s contents and resets the file’s size each time to the default, about 10MB or smaller.

Resolution for Issue 'The company file is 287MB and lately the TLG file is increasing, it’s now 37GB. I’, unable to back up QB. It stops responding. Is it because of the huge TLG file size?' available: Yes (Solved).
Source: Intuit Community forum.

The company file is 287MB and lately the TLG file is increasing, it’s now 37GB. I’, unable to back up QB. It stops responding. Is it because of the huge TLG file size?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for 287MB
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