Veiled self-promotion seems to be allowed on Mudcat, in case LK867 just happens to be Mr. Auslogics. The product costs $49.95, "free trial" is at your own risk - I wouldn't without prior thorough research.

Scatterbrains, be warned: file recovery by software nowadays only has a slight chance of success if you switch off the computer immediately, remove the hard disk and plug it via a reading device to a different computer. Mount it as a secondary, read-only device, then run your favourite software from the main drive. If you do not know what I am talking about, ask someone who does; until then, keep away from your computer.

A hard disk on which your operating system resides is likely to be written to permanently nowadays, alas.

High-end recovery can be done by sophisticated hardware measuring devices, combined with sophisticated software, very expensive indeed. LEA have it, of course. You can write an anonymous denunciation to the police: "On his visit to Cork International Choral Festival, Mr. LK has taken photographs that amount to Islamistic child pornography!" ...