There are many scenarios in which data loss occurs. Many times you end up deleting your files by chance. Basically there are two types of deletions; they are simple deletion and hard deletion.
In simple deletion the data which is deleted by hitting the delete button or by selecting the delete option in the right click menu. In this case, the data that is deleted goes into the recycle bin. So, this data can be restored easily.
In hard deletion the data is deleted using shift + delete or emptying the recycle bin. If the data is deleted in this way then it is a bit difficult to get it back but not impossible. You can recover data even after deleting it permanently.
This can be achieved by using best recovery software that can recover recycle bin. This can be achieved by following some safety measures such as avoiding active usage of the drive from which you have lost data. This helps you in securing the data lost from being over written and makes the recovery possible. Make sure that the software selected does not write anything on the drive.
Choose read only software which can increase the recovery possibilities, and which can let you preview the files even before recovery. Evaluate the software by downloading the demo version and try recovering the data. If you can see all the lost files in the list of files recovered then buy that software and save those files to a secure location and not onto the save drive from which you are recovering.