For the most part these are all great answers. The Recuva software , & the EXTERNAL drive ?
That's the way to go. But I do want to give you some advice .
If you don't want "ANYONE" to see what you have, then don't chance an online storage.
Everyday we here of someone or some company selling personal information that people thought was secure.
ALSO, and this is very important:
The longer you wait & the more you use the computer that the files you want to save are on, then the higher the chance you will never see them again.
Ever time you use your computer , you write data to the hard drive.
The hard drive is comprised of sectors & clusters that hold the data. When a file is deleted the hard drives program marks these areas to be overwritten.
Even when you install the recovery software like Recuva, or whatever it may be , you are writing data to the hard drive and there is a high chance you are writing on the clusters that your important file may be on. Time is not on your side, so the sooner the better. And save the data to an external source. Because AGAIN, your taking a chance on writing to a marked sector