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About 4 days earlier I deleted my important c++ files along with other files on the desktop by mistake without even realizing and figured it out later. I'm unable to find .cpp files in the deepscan of recovery softwares like iSkysoft data recovery. How can I recover them? It's urgent.
The way the SSD deletes data is an immediate and permanent thing. This is why your recovery software won't succeed here. It's so efficient and so secure, Apple removed srm from macOS
Backups : none
Ouch. Unfortunately, your solution would have been to restore from said backup.
Personally, I save all my documents, scripts (bash and AppleScript) to my Cloud drive (iCloud, OneDrive, etc.) It's also backed up to a NAS and to Time Machine. With the low cost and availability of USB drives (flash, spinning and SSD) as well as the many options for cloud storage (both on prem and SaaS), a backup strategy should not be something that gets put on the back-burner because it's too complicated.
Easy when you have TimeMachine: in Finder open the folder where you had these files before you deleted them. Then Enter TimeMachine and go back to just before you deleted them, then select and restore them. As Alan explained, no chance with an SSD without having backups.
When you delete files from the trash remnants will still exist in the free space on the drive. Unfortunately the longer you go without performing a data recovery the likelier your files become unrecoverable. The OS writes new data over old data in free space. If a deep scan didn’t find anything it is likely that your data no longer exists.
It is likely that the files are irretrievable at this point. I’d recommend frequent backups in the future: Time Machine is an excellent solution provided by Apple. This is a bitter pill that most computer users, especially those who go on to become power users, learn at some point.
