
With iTunes File Sharing you can copy files between your computer and iOS application on your iPhone, iPad, iPod touch. For example if you have your favorite albums, artists, tracks located on your Mac you can copy that content to our apps: Evermusic, Flacbox and listen to your music even if you far away from your computer. You can also copy music files to edit audio tags in Evertag app.
If you have macOS Catalina or later, you can use the Finder to share files between your iOS and iPadOS devices and your Mac.
What you need to use the Finder to share files
macOS Catalina or later
An iPhone, iPad, iPod touch with the latest version of iOS or iPadOS
An iOS or iPadOS app that works with File Sharing
See the iOS and iPadOS apps that can share files with your Mac
Open a Finder window.
Connect your iPhone, iPad, or iPod touch to your computer with a USB cable.
Select your device in the Finder.
Click the Files tab to see a list of apps that can share files. If you don't see a Files section, your device doesn't have any apps that can share files.
Click the triangle next to an app to see the files that you can share.

Copy from your Mac to your device
Select the files that you want to copy. Select only files that work with the app. Check the app’s user guide to see which ones work.
Drag the files to the app on your device. The Finder copies the files to your device.
Copy from your device to your Mac
Select the files that you want to copy.
Drag the files to a folder on your computer. The Finder copies the files to your computer.
If you have macOS previous to Catalina you can use iTunes app as described below.
To use File Sharing, make sure that you have the latest version of iTunes and your iPhone, iPad, or iPod touch has the latest version of iOS. If you use Windows PC make sure that you have an up-to-date version of Windows 7 or later.
To start using File Sharing
- Open iTunes on your Mac or PC.
- Connect iPhone or iPad to your computer using the USB lightning cable.
- Select your iOS device in the iTunes.

- Click Apps section, in the left sidebar.
- Scroll to the File Sharing section at the bottom of the page.
- Select the app to see which files are available for sharing on your device.

How to copy files from your computer to the app
- Open iTunes and select the app from the list in the File Sharing section.
- To copy files to your device drag and drop them from a folder or window onto the Documents list.
- You can also click Add in the Documents list in iTunes, find the audio files you want to copy from your computer, and then click Add. iTunes copies these music files to the apps Documents directory on your device.
- Choose only audio files that will work with the app. You can find the list of supported file formats in the app's user guide.

How to Copy files from an iOS app to your computer.
- Select the app from the list in the File Sharing section in iTunes.
- To copy files to your computer drag and drop them from the Documents list to a folder or window on your computer.
- You can also select the audio files that you want to copy to your computer from the Documents list and click "Save to," then find the folder on your computer to which you want to copy the files and click "Save to".

Open shared files
Now you can play the files that was copied from your computer to iOS device.
- Open the app that you chose for File Sharing: Evermusic or Flacbox and tap on the "Local Files" section.
- You can see the list of files available for playing.
- Tap on any file and start the audio player.

Delete a shared files from your iOS device
To delete audio files you copied from computer to an iOS app using File Sharing, follow these steps:
With iTunes
- Open iTunes on your Mac/PC.
- Connect your iOS device to computer using the USB cable.
- Select your device in iTunes.
- Click Apps in the left sidebar and scroll to the File Sharing section.
- Select the app with the file that you want to delete.
- Select the file that you want to delete in the Documents list, then press the Delete key on your keyboard.
- Click Delete in iTunes confirmation message.

With built-in file manager
- Open "Local Files" section.
- Tap more actions button in the top right corner and choose "Select" menu item
- Select files you want to delete.
- Tap "Delete" action. (If action is not visible tap "More actions" menu).
- Tap "Delete" in the confirmation message.

P.S. You can also connect your computer using SMB protocol as described here: Transfer your files from the computer to iPhone using SMB protocol.