• If using Windows 10 or 11, User Account Control can cause this issue
• Follow How to disable User Account Control (UAC) for instructions on disabling UAC

Incorrect network sharing permissions/security

• Verify your sharing permissions by following Verify my data file permissions are correctly set

Remove non-data Files from company directory

1. Select Maintain > Company Information.
2. Note the Directory.
3. Close Company Information and Sage 50.
4. Right-click on the Desktop and select New > Folder.
5. Give the folder a name and press Enter.
6. Open File Explorer and browse to the Directory.
7. Search for *.ddf; move these files into the new folder on the desktop.
8. Search for *.frm; move these files into the folder on the desktop.
9. Reopen Sage 50 and your company, and try making a backup.

Creating a new directory with the core company data files

1. Select Maintain and then click Company Information.
2. Note the Directory for your company.
3. Create a new folder in the data path.
4. Double-click your company folder from step 2.
5. Copy the KeysBackup folder, Version.txt, KMSKeys.xml, and all .DAT files.
6. Paste into the new folder.
7. Select File, Open Company, and open the company file from the new folder that you created in step 3.
8. Verify you can make a backup with no issues.

Custom forms

When Sage 50 creates a backup, it copies the custom form files from the Forms folder in the data path. If one of these files is causing the problem, deleting it from the specific company data directory won't solve the problem. In this case, you would need to remove the offending form from the Forms folder:

Delete custom form from within the program

1. Click Reports and Forms > Forms.
2. Click a custom form that is no longer being used.
3. Click Delete.
4. Continue to delete any other obsolete forms.
5. Verify that the backup will complete now.
6. If the problem persists, continue to delete the remaining custom forms, one at a time.
7. Click the form name, then click Preview and Print from the lower right.
8. Click the Print Setup tab and note the File name.

Delete the custom form in the File Explorer

1. Create a folder on your desktop called Old Sage 50 Forms.
2. Browse into your data path and open the Forms folder.
3. The file name for your custom forms will have this format: [xxx]00[xxx].FRM.
4. The file name for your standard forms will have this format: [xxx]01[xxx].FRM.
5. Remove all of your custom forms from the Forms folder and place them into the Old Sage 50 Forms folder.
6. Sort by file type and remove all of the .PTR files.
7. Verify that you can make a backup now.

Temporarily move the Attachments and/or Archives folder out of the individual company folder

1. Browse to the data location. See How to find data path and program path.
2. Move the Attachment folder out of the individual company folder.
3. Create a backup.
4. Move the Attachment folder into the individual company folder.
5. Obtain a separate backup of the Attachments folder:
6. Right-click Attachments, select Send to Compressed (zipped) folder.
7. Move the Attachments.zip backup to a separate backup folder.