In your own words
You write something like “Where is my application?” or “Find my last screenshot”. You do not need to know the file name.
Your PC looks in Documents, Pictures, Desktop, Downloads, Music, Videos and OneDrive and shows you what fits, with folder and date.
Two taps and it is with you
You tick what you need and tap “Aufs Handy holen” (get it to my phone). “Sichern oder teilen” saves the file or sends it on by mail or messenger.
On a laptop it lands in Downloads.
You decide where it searches
Below the input field there is a tick box “In meinen Dateien suchen” (search my files). Only you set it, and it stays on in that conversation until you remove it.
A question about your files never goes to the internet and never to another member's PC.
Several PCs, one question
If you have a PC at home and another one at the office, connect each of them once.
Then ask one of them or all of them at once.