Have you ever tried to send files through FTP in WordPress media /uploads folder? your media won't be found (indexed in WordPress database).
To import a massive amount of images from a server folder in the native WordPress media manager you can now use WP Media folder Import and synchronize feature from the plugin settings.
This tool will import:
To import a folder go to: Settings > WP Media Folder > Server Import,
then just select the folder and click on Import Folder button:
You can also import a sub folder, just click the folder and then the subfolder.
You will be able to see the imported folders in the WP Media Folder tool. Go to New Post/Page > Add Media
All your imported folders will be in left side panel.
WP Media folder includes a feature to make an automatic sync between WordPress media folder (folders created using WP Media folder) and physical server folders. For what purpose? it may be helpful in case you’re using a 3rd party plugin that manage media outside of the WordPress media manager or simply if you’re using another CMS.
To Sync Servers Folders go to Settings > WP Media Folder > Sever Folder synchronization.
It’s very flexible, select the server folder (the source) and the WP Media folder (the destination), select the sync delay, click on Add, Save changes and you’re done, just wait for the synchronization.
The media synchronization can also be done in the other way, from WordPress media manager to an external folder. This is pretty useful to share media with another plugin or CMS that is using a folder outside the default WordPress one: “/uploads”