immich/docs/docs/FAQ.md
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Document how photo dates are determined (#1978)
* Document how photo dates are determined

* missing word
2023-03-14 14:12:42 -05:00

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# FAQ
### What is the difference between the cloud icon on the mobile app?
| Icon | Description |
| ---------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
| ![cloud](/img/cloud.svg) | Asset is only available in the cloud and was uploaded from some other device (like the web client) or was deleted from this device after upload |
| ![cloud-cross](/img/cloud-off.svg) | Asset is only available locally and has not yet been backed up |
| ![cloud-done](/img/cloud-done.svg) | Asset was uploaded from this device and is now backed up in the cloud/server and still available in original on the device |
### How can I sync an existing directory with Immich's server?
Immich doesn't have the mechanism to sync an existing directory with the server. There is however, a helper CLI tool to help you bulk upload the existing photos and videos to the server. You can find the guide to use the CLI tool [here](/docs/features/bulk-upload.md).
### Why does my uploaded photo show up with the wrong date in Immich?
When a photo is initially uploaded Immich uses the create date of the file to determine where it belongs in the timeline. After that, background jobs will run that extract [exif metadata](https://en.wikipedia.org/wiki/Exif), including the CreateDate, to provide a more accurate date for the photo. If that is not available it will fallback to the modified date. If you want to ensure your photo has the right date, check the exif metadata before uploading.
### Why doesn't Immich watch an existing photo gallery directory?
The initial approach of Immich is to become a backup tool, primarily for mobile device usage. Thus, all the assets must be uploaded from the mobile client. The app was architectured to perform that job well.
### What happens to existing files after I choose a new [Storage Template](/docs/administration/storage-template.mdx)?
Template changes will only apply to new assets. To retroactively apply the template to previously uploaded assets, run the Storage Migration Job, available on the [Jobs](/docs/administration/jobs.md) page.
### Why is object detection not very good?
The model we used for machine learning is a prebuilt model, so the accuracy is not very good. It will hopefully be replaced with a better solution in the future.
### How can I see Immich logs?
Most Immich components are typically deployed using docker. To see logs for deployed docker containers, you can use the [Docker CLI](https://docs.docker.com/engine/reference/commandline/cli/), specifically the `docker logs` command. For examples, see [Docker Help](/docs/guides/docker-help.md)
### How can I run Immich as a non-root user?
1. Set the `PUID`/`PGID` environment variables (in `.env`).
2. Set the corresponding `user` argument in `docker-compose` for each service.
3. Add an additional volume to `immich-microservices` that mounts internally to `/usr/src/app/.reverse-geocoding-dump`.
The non-root user/group needs read/write access to the volume mounts, including `UPLOAD_LOCATION`.
### How can I reset the admin password?
The admin password can be reset by running the [reset-admin-password](/docs/administration/server-commands.md) command on the immich-server.
### How can I **purge** data from Immich?
Data for Immich comes in two forms:
1. **Metadata** stored in a postgres database, persisted via the `pg_data` volume
2. **Files** (originals, thumbs, profile, etc.), stored in the `UPLOAD_LOCATION` folder.
To remove the **Metadata** you can stop Immich and delete the volume.
```bash title="Remove Immich (containers and volumes)"
docker-compose down -v
```
After removing the the containers and volumes, the **Files** can be cleaned up (if necessary) from the `UPLOAD_LOCATION` by simply deleting an unwanted files or folders.