How to configure scheduled backups to a Network Attached Storage (NAS) device

Summary

This guide helps you troubleshoot and resolve: How to configure scheduled backups to a Network Attached Storage (NAS) device. Follow the steps below to fix the issue.

Common Causes

Scheduled backups to a Network Attached Storage (NAS) device give you peace of mind by automatically protecting critical files on PCs and servers. This guide walks you through configuring secure, recurring backups using native tools in Windows and macOS, and ensures your data is safely stored on the NAS for small businesses and home offices.

Quick Fix Steps

Windows 10/11 – File History

Windows File History does not support mapped drives as backup destinations. Use a directly connected external USB drive, or back up to a Windows Server share instead of a NAS.

1. Connect an external USB drive to your PC.
2. Press Win + I to open Settings.
3. Navigate to Update & Security → Backup.
4. Under Back up using File History, click Add a drive and select the external USB drive.
5. Click More options to customise:
   • Back up my files: set to Every hour (or your preferred interval).
   • Keep my backups: choose Until space is needed or a specific number of days.
   • Use Exclude these folders to omit large, non‑essential directories.
6. Press Back up now to start the initial backup. Subsequent backups run automatically.

Windows Server – Windows Server Backup

Windows Server Backup does not support network shares or NAS devices as backup destinations. It supports local volumes and externally connected drives only. For NAS targets, use third‑party backup software.

1. Connect an external drive or select a local volume as the backup destination.
2. Open Server Manager → Tools → Windows Server Backup.
3. In the right‑hand pane, click Backup Schedule….
4. Select Custom and click Next.
5. Choose the items you want to back up (for example, C:\ volumes, system state).
6. On the Destination Type screen, select Local drives and choose the connected drive.
7. Set the schedule (for example, daily at 02:00 AM) and retention policy.
8. Complete the wizard and click Finish. The first backup starts at the next scheduled time.

macOS – Time Machine

Time Machine does not support arbitrary mounted SMB shares as backup destinations. It requires a Time Machine‑compatible network volume (for example, a NAS with Time Machine support enabled) or a directly connected disk.

1. Open System Settings → Time Machine (or System Preferences → Time Machine on older macOS versions).
2. Click Select Disk….
3. Choose a Time Machine‑compatible network volume or directly connected disk.
4. Click Use Disk to confirm.
5. Check Back Up Automatically. Time Machine backs up hourly by default; the interval cannot be changed via the UI.
6. Optionally, click Options… to exclude items.

Detailed Instructions

Preparing the NAS Share

• Ensure the NAS is powered on and connected to the same network as the PC or Mac.
• Create a dedicated share (for example, BackupShare) with read/write permissions for the user account you will use for backups.
• Enable SMB (CIFS) protocol in the NAS settings. AFP can be enabled only for legacy macOS versions.

Mapping the NAS Share in Windows

1. Open File Explorer (Win + E).
2. Right‑click This PC and select Map network drive….
3. Choose an unused drive letter (for example, Z:).
4. In the Folder field, type the full UNC path, for example \\NAS\BackupShare.
5. Check Reconnect at sign‑in and, if required, Connect using different credentials. Enter the NAS username and password.
6. Click Finish. The NAS share now appears as a local drive.

Mounting the NAS Share in macOS

1. Open Finder → Go → Connect to Server… (Cmd + K).
2. Enter smb://NAS/BackupShare (use afp:// only for legacy macOS) and click Connect.
3. Authenticate with your NAS username and password.

Securing Your Backups

• Enable encryption on the NAS share (most devices offer AES‑256 encryption).
• Use strong, unique passwords for NAS accounts.
• Restrict NAS access to specific IP addresses or MAC addresses where possible.
• Schedule regular NAS firmware updates to patch security vulnerabilities.

Australian Small Business Context

For Australian small businesses, backup strategy should account for local infrastructure and disaster recovery needs.

• NBN considerations: If your office relies on an NBN connection, schedule large initial backups outside business hours to avoid saturating your upload bandwidth. Subsequent incremental backups typically use far less data.
• Offsite backup: A NAS protects against hardware failure and accidental deletion, but it does not protect against fire, flood, or theft at your premises. Follow the 3‑2‑1 backup rule: keep at least three copies of your data, on two different media types, with one copy offsite.
• Business hours: Schedule backup jobs overnight or during quiet periods to minimise impact on staff productivity and internet performance.
• Support: If you need assistance configuring or monitoring your backups, you can Open a Ticket.

Testing Backup Restores

Configuring a backup is only half the process. You must verify that you can restore data before you need it in an emergency.

1. Choose a non‑critical file or folder that was included in a recent backup.
2. Perform a test restore to a temporary location (for example, a folder on your desktop).
3. Open the restored file to confirm it is intact and readable.
4. Document the date of the test and the result. Repeat this process monthly.
5. If a restore fails, review the backup logs and correct the issue immediately.

Troubleshooting

Common Issues

• Cannot connect to NAS share
  • Verify the NAS is online and reachable (ping NAS from the PC).
  • Check that SMB services are enabled on the NAS.
  • Ensure firewall rules allow traffic on port 445 (SMB).
• Authentication failures
  • Confirm you are using the correct NAS username and password.
  • Reset the saved credentials in Credential Manager (Windows) or Keychain Access (macOS).
• Backups stop after a few cycles
  • Check NAS free space; delete old snapshots or expand the volume.
  • Review the backup log for error codes (for example, 0x80070020 – file in use).
  • Exclude large, frequently changing files (for example, virtual‑machine images) from the backup set.
• Performance is slow
  • Connect the NAS via Gigabit Ethernet rather than Wi‑Fi.
  • Schedule backups for off‑peak hours.
  • Enable jumbo frames on both the NAS and network switch if supported.

Log Files & Diagnostic Tools

• Windows: Event Viewer → Applications and Services Logs → Microsoft → Windows → Backup.
• macOS: Open Console and filter for backupd entries.
• NAS: Most devices provide a system log accessible via the web admin interface; look for “backup” or “SMB” errors.

Related Articles

• How to backup photos to external drive
• Understanding the 3-2-1 backup rule
• How to test backup restores
• NAS security best practices for small business

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