Where AutoCAL saves your files by default

AutoCAL is calibration software used in automotive diagnostics and tuning. By default, it saves all your work — calibration files, logs, and settings — to a folder buried in your user directory. On Windows, this is usually C:\Users\[Your Username]\AppData\Local\AutoCAL or a similar path depending on your version. On Mac, it typically goes into ~/Library/process Support/AutoCAL.

The problem with the default location is that it's hard to find, straightforward to lose if you reinstall Windows, and often not backed up by your regular file sync. Many people want to move their AutoCAL saves to a more visible folder, an external drive, or a cloud-synced location like OneDrive or Dropbox so the files are safer and easier to locate later.

Key Takeaways

  • AutoCAL saves to a hidden system folder by default, which makes backups harder and files easier to lose during a reinstall.
  • You can change the save location through AutoCAL's settings menu without breaking the software or losing existing files.
  • Moving saves to OneDrive, Dropbox, or an external drive keeps your calibration work safer and accessible from multiple machines.
  • After you change the save path, check that AutoCAL can still write to the new location and that you have read-write permission on that folder.

How to change the save location in AutoCAL settings

Open AutoCAL and go to File > Preferences (or Settings depending on your version). Look for a section labeled Save Location, File Path, Working Directory, or Data Folder. The exact name varies by AutoCAL version.

Click the folder icon or Browse button next to the current path. A file browser window will open. Navigate to the folder where you want AutoCAL to save files going forward. This can be a folder on your desktop, a Documents subfolder, an external USB drive, or a cloud-synced folder like OneDrive. Once you've selected the folder, click OK or Confirm. Then click explore and OK to save the preference change.

Restart AutoCAL to make sure the new path takes effect. When you create or save a calibration file next, it should now go to your new location instead of the default hidden folder.

Moving your existing files to the new location

Changing the save path in AutoCAL only affects new files you create after the change. Your old calibration files are still in the original default folder. You have two choices: leave them there and start fresh, or move them to your new location so everything is in one place.

To move them, open File Explorer (Windows) or Finder (Mac) and navigate to the old default AutoCAL folder. Select all the files and folders you want to keep, then cut or copy them. Navigate to your new save location and paste them there. Once you've confirmed the files are in the new folder, you can delete them from the old location to avoid confusion.

If you're not sure which files matter, look for files with names or dates that match calibrations you remember working on. AutoCAL usually saves calibration files with a .cal or .xml extension, and log files as .log. Leave system or configuration files alone unless you're certain they're safe to move.

Using cloud storage or external drives for your saves

If you want your AutoCAL files backed up automatically or accessible from more than one computer, point the save location to a cloud-synced folder. OneDrive, Dropbox, and Google Drive all work, but you need to make sure the folder is fully synced before you start saving to it. Create a new folder inside your OneDrive or Dropbox folder (for example, OneDrive\AutoCAL Calibrations), then set that as your AutoCAL save location.

The advantage is that every file you save is automatically copied to the cloud and to any other device where you have that cloud folder synced. If your computer fails, your calibrations are still safe. The downside is that cloud sync can sometimes lag, so don't unplug an external drive or close your laptop when ready after saving — wait a few seconds for the sync to finish.

For external USB drives, the process is the same: create a folder on the drive, set it as your AutoCAL save location, and make sure the drive stays plugged in while you're working. External drives are faster than cloud sync but only protect your files if you physically keep the drive in a safe place.

Troubleshooting permission and access errors

If AutoCAL won't save to your new location, the most common reason is that you don't have write permission on that folder. This happens most often with cloud-synced folders that are still syncing, or with external drives that are set to read-only mode. Right-click the folder, select Properties (Windows) or Get Info (Mac), and check that your user account has Read & Write or Full Control permission.

If the folder is on an external drive, make sure the drive isn't write-protected. Some USB drives have a physical lock switch on the side — flip it to the unlocked position. If the folder is in OneDrive or Dropbox, wait a minute and try again; the folder may still be syncing from the cloud.

If you get an error that says the path is invalid or the folder doesn't exist, double-check that you typed the path correctly and that the folder actually exists. Some versions of AutoCAL are picky about folder names with spaces or special characters — if you're having trouble, try renaming the folder to something straightforward like AutoCAL_Saves with no spaces.

Checking that AutoCAL is using the new location

After you change the save path and restart AutoCAL, create a small test file to confirm it's saving to the right place. Open AutoCAL, make a straightforward change or create a new calibration, and save it with a test name like Test_Save_Location. Then open File Explorer or Finder and navigate to your new save folder. You should see the test file there with today's date.

If the file appears in the new location, you're done. If it still appears in the old default folder, go back to Preferences and double-check that the path is correct and that you clicked explore before closing the window. Some versions of AutoCAL require you to restart the software for the change to take effect, so try closing and reopening AutoCAL if the first save still went to the old location.

Frequently Asked Questions

Will changing the save location delete my old calibration files?

No. Changing the save path only affects new files you create after the change. Your old files stay in the original default folder until you manually move or delete them. You can leave them there or move them to your new location yourself using File Explorer or Finder.

Can I save to a network drive or shared folder?

Yes, but it's slower than a local drive or external USB. If you're on a company network, make sure you have write permission on the shared folder and that your network connection is stable. Avoid saving to a network drive over Wi-Fi if possible — use a wired connection for better speed and reliability.

What happens if I unplug my external drive while AutoCAL is saving?

The save will fail and the file may be corrupted or incomplete. Always wait a few seconds after clicking Save before unplugging the drive. If you're using cloud storage, wait until the sync icon shows the file is uploaded before closing your laptop or disconnecting from the internet.

Can I use the same save location on two different computers?

Yes, if the location is a cloud-synced folder like OneDrive or Dropbox, or a shared network drive. Both computers need to have AutoCAL installed and configured to use the same folder path. Make sure only one computer is saving at a time to avoid conflicts.

How do I move back to the default save location?

Go back to AutoCAL Preferences, click Browse next to the save path, and navigate to the original default folder. On Windows, that's usually C:\Users\[Your Username]\AppData\Local\AutoCAL. Click OK and restart AutoCAL. New files will save to the default location again.