I had this app, "FFM" and I accidentally deleted

It can be most aggravating when an important photograph is accidentally deleted. If you have an iPhone 6, then thankfully, there are a few options available for flv files recovery from this device. Remember, it is good practice to back-up your photographs every now and again by saving them onto an external storage device.
One of the first things to do in trying to retrieve deleted photos from an iPhone 6, is to open the Photos app on your smartphone. Once you have done that, do the following steps:
1.Select the "Albums" menu.
2.Select the album that you need and then select "Recently Deleted."
3.A list of all the recently deleted photos will appear.
4.Select the ones that you want and then tap on the "Recover" button to recover all the photographs that you selected.
5.All restored photographs will be sent to the album in which they were originally located.
If the photographs that were deleted were backed up in iTunes or iCloud, they can also be recovered. The important thing to remember is to have either iCloud or iTunes backup turned on at all times. If you are unsure how to do so, here's how:
1.Go to the "Settings" menu then select "iCloud."
2.Under "iCloud", select "Storage and Backup."
3.Then turn on the "iCloud Backup" feature on your iPhone 6.
4.As long as your iCloud backup is up-to-date, then all your photos can be easily restored to your iPhone 6 in case of accidental deletion.

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Backing up your photographs to iTunes is equally as easy as backing them up to iCloud. However, once you connect your iPhone 6 to your computer or iPad, you need to ensure that iCloud is turned off; you can back-up to one or the other but not both apps at the same time.
If your photos have been deleted, then recovering your duplicate photos from iTunes backup or iCloud backup is not a problem. Simply launch iCloud or iTunes, right click on iPhone (the device in question), select "Summary", and then select either "Restore from iCloud Backup or "Restore from iTunes Backup." Once that is done, wait for "Restore in Progress" to complete and your device restarted.
When all else fails, a reliable data recovery software can be used to recover deleted photos from an iPhone 6. uFlysoft is one such user-friendly software that gets the job done quickly and thoroughly. The process is simple and takes these easy steps:
1.First, connect your iPhone 6 to your Mac computer then launch the uFlysoft data recovery software. You never want to launch a data recovery software directly from the smartphone from which you are trying to recover lost or deleted data.
2.Select the "Recover from iOS Device" option.
3.The software will then scan your device and present all the recovered photographs for you to preview.
4.The recovered photos can then be saved to any storage device or the computer itself.

RE: http://www.uflysoft.com/

Part 1. Delete Individual Songs from iPad

Step 1. Launch the Music app on your iPad.

Step 2. Tap "Songs" on the bottom to see all of the music on the device. Choose the individual track you want to delete and slide your finger to the left across the songs.

Step 3. Tap on the red "Delete" button to remove music from your iPad.

Part 2. Delete All Songs from iPad

Step 1. Go to the iPad's homepage and tap on "Settings" icon.

Step 2. Tap "General" > Select "Usage" > Choose "Music." The iPad will display how much space is taken up by music on your device.

Step 3. Tap "Edit" button on the top-right > Tap the red icon next to All Music > Tap on "Delete" to remove all songs from iPad.

Part 3. Delete Selected Songs from iPad with AnyTrans

AnyTrans is an all-around iOS files manager that made to transfer and manage all your iPhone, iPad, and iPod content, such as, music, videos, photos, contacts, notes, messages, apps, etc. You can freely add or delete songs from your iPad with AnyTrans.

Step 1. Download and install AnyTrans on your computer. Run it, and connect your iPad to computer.

Step 2. On the homepage of AnyTrans > Click "Audio" > Select "Music".

Step 3. Highlight the songs you want to delete and click the trash icon on the top-right of this window to delete the unwanted songs.

Resource from: How to Delete Music from iPad

How to Delete Music from iPad in Three Ways