Why save to NAS
I have been reluctant to use some cloud albums ornetdiscservices to back up and save your own photos, mainly for two reasons:
- I don't want my privacy to be abused by these service providers. The photos and videos you upload will definitely be scanned by these service providers. Even if there are no private photos, I can't accept my privacy being invaded like this.
- You don't want your data to be kidnapped. After all, the data is in the hands of others. One day, if others want to run away or raise prices, you have nothing to do
Too trying a solution
Synology moments
At first, the NAS was installed with Synology, so I used the moments that comes with Synology to synchronize photos. After using it for a while, some problems appeared:
- moments app Almost no longer updated, the experience is not bad, but definitely not good, my wife always complains ios This doesn't work, that doesn't work
- Binding with Synology, because it must be used with the moments server, so you don't have any other options, which makes me feel very passive
Now it seems that Synology has eliminated moments and released the new Synology photos. I have not tried this because Synology hardware is still too expensive. Now I have switched to Unraid.
PhotoPrism – super easy to use
have to say PhotoPrism It's really easy to use. What I like most about it is that it has strong compatibility. You just need to throw it a directory, and it can process all the photos in it, and it can search in various dimensions. For a very large number of photos It's really useful.
But the problem is that PhotoPrism only has a server side, and I have to find a way to complete the action of synchronizing photos to NAS
PhotoSync – not worth the price
The functions of this app are still good, but its UI and interaction are a bit old. I also need to use a dedicated app for synchronization. The most important thing is that I have to pay to use it. I don't think it is worth it, so I give up.
Nextcloud – poor mobile app
nextcloud It is very easy to use as a network disk. I try to use the mobile terminal of Nextcloud to synchronize album photos. But I really installedAndroidAfter launching the app, the URL after connecting to my https reverse generation actually crashed and was completely unusable, so I gave up.
Alist + Pho + Rclone + PhotoPrism – The Ultimate Solution
What I like most about this solution is that all links are not coupled. Removing any one link will not affect other links. Everyone can replace a certain part according to their own preferences.
Alist
Official website: https://alist.nn.ci/zh/
Responsible for mapping the various available storage intowebdav,Support various cloud disks, network disks and local storage 
Pho
Official website: https://pho.tools/
Responsible for passingwebdavUpload photos toAlistA good thing about mapped storage is that it supports encrypted upload, so that you can make a secondary backup on the network disk, which adds a layer of data insurance while avoiding privacy leaks.
And I can use this app directly on my mobile phone to browse my local and uploaded photos. The UI and interaction of this app are very good, and I can use it directly to replace the system's own photo album. 
Rclone
Official website: https://rclone.org/
Responsible forAlistofwebdavMapped to the file system of the NAS to feed photos to PhotoPrism
PhotoPrism
Official website: https://www.photoprism.app/
The ultimate "gatherer", all the photos backed up by all the devices in the family are finally fed here. Even if there are massive photos, you can quickly index the photos you want to find based on it. 
final effect
Browsing and uploading on mobile phones
usePhoBrowse local and recently uploaded photos
Find and browse photos from a time in the past
Use based on informationPhotoPrismJust search
Alist + Rclone + Pho + photoprism This is just the solution I chose. In fact, this solution is extremely compatible. Almost any one of them can be removed or replaced and it will still work perfectly. The solution can be simplified without any of the functions.
I use this solution to take into account my other needs, such as plex to play movies on the network disk, secondary encrypted backup to the network disk, etc.
The photo backup solution is also too complicated. The photo album backup on my Android phone is syncting (synchronization) + PhotoPrism (display). TrueNAS nfs shares a folder to store the photos, and the NAS is responsible for the backup.
syncting If you have a public IP at home or equipped with FRP, you can synchronize remotely. If you don't have one, you can also synchronize via WIFI LAN at home.
