===== [V8] FAQ: Troubleshooting backup problem with inaccessible network drive ===== Article ID: 8065
Reviewed: 2019-09-26

Product Version:
AhsayACB / AhsayOBM: 8.1 to 8.x
OS: Windows ===== Description ===== When performing backup for a mapped network drive, the following warning message is displayed:

No.	Type	Timestamp	Log
*	...	...	...
*	warn	YYYY/MM/DD hh:mm:ss	Backup source "\\server\share" does not exist !
*	warn	YYYY/MM/DD hh:mm:ss	Skip backing up "\\server\share\file" (network drive is not accessible)
*	...	...	...

The message suggests that the corresponding network drive cannot be accessed by the backup process. Please refer to the following guideline on how to troubleshoot the warning. ===== Steps ===== The following are some steps to follow for troubleshooting errors related to Volume Shadow Copy (these steps may vary depending on the operating system):

Network drive accessibility
Have you tried accessing the mapped drive recently?

Try to access the mapped drive and then add / delete a file in the drive to confirm if the mapped drive is in fact accessible.

File sharing permission
Did you change the file sharing permission setting recently?
- Right click on the corresponding shared folder.
- Click on the Share... button.
- Check if the file sharing permission setting is correct.
User Account Control (UAC) setting
Is the User Account Control: Behaviour of the elevation prompt for administrators in Admin Approval Mode policy setting is configured to Prompt for credentials?
- Open the Local Group Policy Editor (gpedit.msc).
- Check under Computer Configure > Windows Settings > Security Settings > Local Policies > Security Option:
- If the setting is configured to Prompt for credentials, refer to the following article from Microsoft for workaround:
  
  https://support.microsoft.com/en-hk/help/3035277/mapped-drives-are-not-available-from-an-elevated-prompt-when-uac-is-co
Re-map the network drive
Ensure that the network drive was correctly mapped, try re-mapping the network drive:
- Right click on the command prompt icon, select Run as administrator.
- Enter the following command:
  
  >net use e: \\server\share_name /user:username password
  
  Click Here for syntax of the net use command.

===== Keywords ===== network, drive, map, mapped, share, shared, accessible, inaccessible