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# External Library
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### Can I add an external library while keeping the existing album structure?
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We haven't put in an official mechanism to create album from your external library yet, but there are some [workarounds from the community ](https://github.com/immich-app/immich/discussions/4279 ) which you can find here to help you achieve that.
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### I got duplicate files in the upload library and the external library
It is important to remember that Immich does not filter duplicate files from [external Library ](/docs/features/libraries ) at the moment.
Upload library and external library different mechanism to detect duplicates:
- Upload library: hashes the file
- External library: uses the file path
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Therefore, a situation where the same file appears twice in the timeline is possible.
