There is a common misconception that deleted files cannot be recovered in real. Well, that is a myth and I will prove this in this article.
So, technically all kind of files (whether big or small ) can be recovered but in only one condition.
The condition is that there shouldn't be any overwriting. Overwriting means that no new files copied or created in the same folder or directory immediately after any files deleted.
In general, some space is located for every file and if that place is filled by some other files then there is no chance of recovery. So, must start the recovery process immediately after files deleted otherwise there is partial or no chance of recovery.