Start by testing Synology Photos before adding another application. It already offers tags, ratings, conditional albums, sharing permissions and supported metadata editing. Add a desktop catalog or team DAM only when a concrete workflow requires it. This is a documentation-based comparison, not a timed NAS benchmark. PhotoLib is published by Daminion, one of the options discussed below.
Four Synology photo-management setups
| Setup | When to evaluate it | Responsibility to keep explicit |
|---|---|---|
| Synology Photos | Mobile backup, browsing, albums and controlled sharing | NAS/DSM compatibility, metadata limits and backups |
| Daminion beside the NAS | A shared working archive with a separately administered catalog | Windows server, network access and edition-specific functions |
| digiKam with a network collection | A desktop-managed photo library | Collection paths, database location and metadata-writing policy |
| ResourceSpace with NAS-backed storage | A web DAM with an IT owner for deployment | Application stack, storage integration, security and maintenance |
The NAS provides storage and services; the application provides its own catalog and workflow. Neither RAID nor a searchable catalog replaces a tested backup. Our DAM vs NAS guide discusses that distinction. If you are comparing NAS ecosystems, the QNAP photo-management and QuMagie alternatives guide covers QNAP tags, conditional search and deployment checks separately; do not assume identical metadata behavior.
Synology Photos: capabilities and real limits
The official Synology Photos page describes mobile backup, folder/timeline browsing, albums, sharing and RAW support. The technical specifications also list tags, descriptions, ratings, conditional albums, selected-user Shared Space, sharing permissions and filters for fields such as camera, lens and tag. It is inaccurate to say its search ends at filenames and faces.
Compatibility matters. Face and object recognition are available only on supported NAS models. Some formats require Synology Image Assistant for previews or compressed playback, and the exact behavior depends on DSM and media format. Test your actual camera files rather than assuming that every RAW or HEVC file behaves identically.
Does Synology Photos write tags to files?
For supported photo formats, it can. Synology's metadata support article describes XMP, Exif and IPTC support. General tags correspond to XMP Subject and IPTC Keywords. The document says changes to supported metadata can be written back for JPG, JPEG, JPE, PNG and CR2 photographs.
The same article documents important exceptions: some fields in HEIC, CR3 and X3F are editable only within the package, and specified metadata changes are not written to original videos. Album membership, face organization and file metadata are different things. Do not promise that all organization will migrate, but do not claim that every tag is trapped in the database either.
For a safe check, tag a copy of a representative file, download the original and inspect it in another metadata-aware application. Repeat with each important format and field. Keep the original test files and compare the results before applying a library-wide editing policy.
Daminion alongside Synology storage
The self-hosted Daminion architecture separates the application server from file storage. A supported Windows server can work with network storage; it is not a native Synology DSM package. Do not assume any spare PC or any NAS-hosted virtual machine will meet the deployment requirements.
The customer-confirmed feature matrix includes custom tags, roles, version control and different desktop/web capabilities. Shared collections are web features, while CSV tag import and tag presets are desktop features. Cloud does not provide the same folder-based workflow as self-hosted Daminion. For this route, evaluate the actual server, clients and share permissions together; see the Daminion product review.
Use a pilot folder before pointing multiple applications at the whole archive. Agree which program may modify metadata, rename or delete files, and how the other application notices changes. Reading files in place does not prove that concurrent editing or deletion is safe.
- Originals: the photographs and videos on the NAS, with their file permissions.
- Catalog: application metadata, albums, previews and user permissions, backed up according to that application.
- Recovery: a separate backup and a tested way to restore both originals and required catalog data.
A second catalog is not a second backup. An application permission does not necessarily protect the same file from a user who can access its SMB share directly.
digiKam and ResourceSpace
digiKam: separate the collection from its database
digiKam can be considered for a desktop photo workflow with a network collection. Its database documentation explicitly says SQLite databases should not live on network media. Keep them on suitable local storage for that configuration rather than placing a shared SQLite file on the NAS.
The documentation also describes a remote MariaDB configuration, but a remote database alone does not create a team DAM with approval roles and safe concurrent workflows. Choose the setup for your needs, verify network performance and plan database backup. The free and open-source software guide distinguishes desktop tools from multi-user systems.
ResourceSpace: a deployment to operate, not a universal NAS package
ResourceSpace's installation documentation describes a PHP/database application, configuration, scheduled tasks and preview dependencies. A container deployment still needs compatible hardware, persistent storage, security, upgrades and recovery.
This review does not establish that every Synology model can run ResourceSpace, that it will index an existing share without configuration, or that a fixed asset count determines when to move it elsewhere. Verify the model's application support and the intended storage integration; a separate application host may be more appropriate.
Costs and setup time: measure your own archive
Synology markets Photos without a separate subscription, but the NAS, disks, backup storage, electricity and administration still cost money. Another application adds its own license or hosting, server resources, maintenance and migration work. Open-source software does not remove those operational costs.
There is no verified “half-day deployment,” “45 minutes per 25,000 RAW files” or AI-tagging cost estimate in this review. File formats, NAS resources, network speed, preview generation and metadata volume affect indexing. Start with representative copies, measure processing and failures, and verify search and permissions before expanding.
Before using two photo applications on the same share
- Back up originals and relevant application data, then verify recovery on a sample.
- Start with read-only access where possible; grant write access only for a tested requirement.
- Choose the authoritative editor for keywords, ratings and filenames.
- Test changes, renames, moves and deletions in both applications using disposable copies.
- Check access through both the application and the underlying share.
- Document what will migrate in file metadata and what requires a separate catalog export or backup.
FAQ
What is the best photo management software for Synology?
Start with Synology Photos if its backup, album, metadata and sharing functions meet the requirement. Evaluate an additional desktop catalog or team DAM only for a specific gap, with the NAS and application responsibilities kept separate.
Can Synology Photos edit IPTC or XMP tags?
Its official metadata matrix documents general tags mapped to XMP Subject and IPTC Keywords, with write-back for specified photo formats. Other formats and video fields have limitations. Test the exact format and field you need.
Can Daminion run as a native Synology package?
The self-hosted architecture discussed here uses a supported Windows server alongside network storage, not a native DSM package. Confirm server resources and share access for the proposed deployment.
Can I put digiKam's SQLite database on the NAS?
digiKam's documentation says SQLite databases should not be stored on network media. A network photo collection and a database location are separate choices; remote MariaDB is a different configuration.
Will all Synology Photos organization move to another application?
Not necessarily. Some supported metadata can be written to originals, while other fields or application relationships may remain in the catalog. Test exported files and plan backup or export of application-specific information separately.
Should two photo applications write to the same folders?
Do not assume coexistence is safe without testing. Define an authoritative editor, begin with copies or read-only access, and verify metadata edits, renames, deletions and permissions in both applications.
Official sources and scope
Synology Photos product, technical specifications and metadata support matrix, digiKam database documentation and ResourceSpace installation overview linked above were checked October 21, 2026. Daminion architecture and edition statements use customer-confirmed project documentation. No hands-on NAS benchmark, rating score or promised rollout duration is claimed.