Did you really just format that external disk? Recover its data on macOS with data recovery software.
Method 1
Using a data recovery application
Step 1:
Download the tool, install it, and start the program
Step 2:
Scan your disk or partition for recoverable files
Step 3:
Choose a stoage location and use it to recover your files
Best 3 data recovery software for Mac
Updated 05 April. 2020
Free, Professional $49.95, Ultimate $59.95, Technician $299.95
Free recovery: Free recovery - 100 MB
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Method 2
Recover deleted data from previoulsy made backups
Step 1:
Start your backup and recovery tool
Step 2:
Search the storage media to find the files you wish to recover
Step 3:
Recover files to your computer from the backup media
Method 3
Take your computer to a data recovery facility
Step 1:
Pack up your machine and drive to a recovery center
Step 2:
Find something to do while the data is being recovered
Step 3:
Get the bad news that physical recovery has failed