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My first NAS! Backup strategy?

#1
Hey guys!

Setup:
I purchased my very first NAS - a DS923+ with compatible 2x 8TB HDDs.

Background:
The purpose of this NAS is to simply backup files from my Google Drive to the NAS in one direction i.e. changes in Google Drive should update in the NAS but NOT vice versa. Also, any files deleted in Google Drive should NOT be deleted in the NAS. For reference, the files are updated often. I do not need to see the NAS on the network etc.

Question:
Should I set up cloud-sync to do a one-way sync and/or should I set bidirection cloud-sync with snapshots?

Any advice or YT links would be appreciated.

Thanks in advance!
Far
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#2
Congratulations on your new DS923+! It's a great choice for starting your NAS journey. Let’s dive into the best way to set up your backup strategy to achieve your goals.

Requirements Recap:
One-way sync from Google Drive to the NAS.
Files deleted in Google Drive should not be deleted in the NAS.
Regular updates as files change on Google Drive.
Recommended Setup:
1. Use Synology Cloud Sync for One-Way Sync:
Setup:

Install Cloud Sync from the Synology Package Center.
Configure it with your Google Drive account.
Choose the one-way sync option (Download Remote Changes Only).
Set conflict policies to ensure that updates in Google Drive overwrite NAS versions.
Disable "Delete files on the NAS when they're deleted in the cloud" to ensure files are preserved locally.
Reason: This ensures changes in Google Drive are mirrored to your NAS but prevents accidental deletions from propagating.

2. Enable Versioning/Snapshots:
While one-way sync is great, it doesn’t inherently protect you from file corruption or accidental overwrites on Google Drive.

Use Synology Snapshot Replication or File History (depending on your volume setup) to periodically capture versions of your data. This acts as a fallback in case files are corrupted or altered unintentionally in the cloud.

Frequency: Set snapshots to occur daily or weekly, depending on how often your Google Drive content changes.

3. Optional: Backup to an External Drive or Cloud:
For added redundancy, consider backing up your NAS to an external HDD or another cloud service.

Use Hyper Backup to:

Copy your synced Google Drive data to an external drive periodically.
Or, back up this data to a cloud provider (like Synology C2 or Backblaze B2).
This ensures you have a secondary backup in case something happens to the NAS.
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