The software scans disks in two different ways, run in succession, to look for lost data: first based on the file directory and the second based on the storage content. This data, so long as it is not overwritten, can be recovered. The deleted data itself is not immediately removed from the physical drive and often exists as a number of disconnected fragments. The space can then be used, or overwritten, with data from other files or computer functions. When data is deleted from storage devices, the references to the data are removed from the directory structure. The 'Recover' button on lower-right highlights when the scan is completed but clicking it prompts the user to pay for an upgrade. It does a 'Quick Scan' producing a file count and data count of 'Deleted Files' (usually small) and an 'Advanced Scan' giving the file/data counts for 'Lost Files' and 'Existing Files'. The free version searches for and identifies recoverable data but does not recover any files until a license is purchased. There are free and paid versions of the software on both Windows and macOS. EaseUS Data Recovery Wizard is a Chinese data recovery program that utilizes a Wizard (software) user interface to guide users through the data recovery process.
