QuickBooks Desktop 2016 Company File Types: What to Keep and Protect
Learn about the file types QuickBooks Desktop 2016 creates (.QBW, .QBB, .QBM, .ND, .TLG) and exactly which files you need to protect long-term after sunset
When Intuit discontinued live support and services for QuickBooks Desktop 2016 on May 31, 2019, the responsibility for keeping your accounting data safe shifted entirely to you. To maintain your 2016 company file indefinitely, you need to understand the specific files this version generates and know exactly which ones are critical for your long-term survival.
The Core File Types in QuickBooks 2016
QuickBooks Desktop 2016 generates several different files when you create, back up, or operate a company file. Here is what each extension means:
- .QBW (QuickBooks Company File): This is your primary, live working file. It contains all of your financial data, transactions, templates, and preferences.
- .QBB (QuickBooks Backup): This is a compressed archive of your company file. You create this when you use the built-in backup utility in QuickBooks 2016.
- .QBM (QuickBooks Portable File): A highly condensed version of your .QBW file. It contains financial data but omits letters, logos, and images, making it small enough to easily email or transfer.
- .ND (Network Data File): A small configuration file that allows QuickBooks 2016 to access the company file in a multi-user environment over a network.
- .TLG (Transaction Log File): A continuous log of all transactions entered since your last backup. It is used by the automated backup system to restore data if the main .QBW file crashes or gets corrupted.
Which Files to Protect for the Long Haul
If you are forced to restore your system or move QuickBooks 2016 to a new computer after a crash, you do not need to save every single file.
Your primary focus is the .QBB backup file. Because it is a compressed, self-contained archive, it is the safest and most reliable way to rebuild your company data.
Your secondary focus is the live .QBW file. If you are migrating your installation to a new hard drive, copying this file over is how you get back to work immediately.
You can safely ignore the .QBM portable file for long-term archiving, as it strips out certain attachments and templates. It is strictly a convenience tool for moving data between computers.
The Role of .ND and .TLG Files
You do not need to archive .ND or .TLG files for the long haul. They are temporary operational files that QuickBooks 2016 generates automatically.
- The .TLG file only matters if your live .QBW file is currently damaged and you need to recover transactions entered after your last good backup. Once you successfully create a new .QBB backup, the .TLG file resets.
- The .ND file is specific to the computer and network where it was created. If you move your company file to a new machine, QuickBooks 2016 will simply create a new .ND file when you set up multi-user hosting.
Maintaining Your 2016 Files Without Intuit Support
Because QuickBooks 2016 no longer receives updates, you cannot rely on Intuit's servers for automatic cloud backups or automated file recovery. You must maintain local, redundant backups of your .QBB and .QBW files.
Store your backups on external hard drives or secure local network drives, completely disconnected from your primary workstation when not actively backing up. This protects your legacy 2016 data from ransomware, hard drive failures, and operating system updates that might inadvertently corrupt your historical records.
If your primary .QBW file ever fails to open, or if your .QBB backup throws an error when you try to restore it, you can attempt a manual rebuild using the QuickBooks File Doctor tool built into your 2016 installation. If the built-in diagnostic tools fail to recover the corrupted data, you may need to consult a specialized QuickBooks file repair service to manually extract and rebuild the data from your damaged .QBW or .TLG files.