My transferring was interrupted . What do I do now

Transfer from where?

1. iPhone to iPhone, there are three ways,
   1. Quick Transfer --> Use QuickStart to transfer data to a new iPhone, iPad or iPod ...
   2. Restore from iCloud Backup --> Restore or set up your device from an iCloud backup - Apple ...
   3. Restore from iTunes backup --> Restore your iPhone, iPad, or iPod touch in iTunes on PC ...
2. Android to iPhone
   1. You may --> Move from Android to iPhone, iPad, or iPod touch - Apple ...
   2. If that fails or you do not want to attempt or have already set up your device. then...You can still transfer these data.
      1. Photos & Videos --> Upload to iCloud Photos using the same Apple ID that you have used on your iPhone. After upload, enable iCloud Photos on your iPhone. That's it.
      2. Contacts --> Contacts are not stored on an iPhone nor on SIM, they are synced to  Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other. Upload all your contacts to any of the above email client-server.
      3. Any Specific Files --> Upload to Cloud Drives (iCloud Drive, Google Drive, OneDrive, DropBox, Flickr, box, AmazonDrive, Adobe Creative Cloud and Use Files app on iPhone
      4. Apps --> In any way they have to be redownloaded using the App Store.

Transfer photos and videos from your iPhone, iPad, or iPod touch - Apple ...

Import to your Windows PC — Import to your PC · On your iOS or iPadOS device, open the Settings app. Tap Camera, then tap ...

Transferring what? From where?