If your data is already saved as a file, there are several methods for moving or copying it into an EagleFiler library:
Moving Files Into the Library
In the Finder, you can drag and drop to move files into the To Import folder or the Files folder.
Copying Files Into the Library
Drag and drop onto the source list, records list, Drop Pad, or Dock icon. Hold down the Option key to have EagleFiler show you the options window.
Select files in another application and invoke one of EagleFiler’s Services via a menu or keyboard shortcut. Hold down the Option key to have EagleFiler show you the options window.
Choose Import Files… from the File menu.
In the Finder, Option-drag to copy into the the To Import folder or the Files folder.
Select the files in the Finder and press the capture key.
Drag and drop files from one EagleFiler library window to another.
Control-click on a file in the Finder and choose Open With ‣ EagleFiler. Hold down the Option key to have EagleFiler show you the options window.
Use the Share menu in any app, after enabling EagleFiler’s share extension.
Run an AppleScript such as:
tell application "EagleFiler"
import files {POSIX file "/Users/mjt/Desktop/MyFile"}
end tell
EagleFiler uses APFS’s cloning feature so that file copied into the library do not use any additional disk space.