organise files

I have trouble putting documents into folders. I now how to click and drag but often the document will not go where I inten
I have a group of documents and folders for one subject. I would like to have them all together. Bt someone told me that is not advisable; could lose everything by accident.

I try to drag a file/document into Trash and it won’t stay.

This sounds like a question about how to use your operating system (Windows? Linux? Mac?), not about LibreOffice.

I agree. The questioner needs to sit down with someone who can explain how to use the file manager in their particular operating system, possibly Windows Explorer (not to be confused with Internet Explorer). Grouping files logically is definitely a Good Thing to do. As for loosing “everything by accident”, that’s why we back up stuff regularly – but, another topic completely.

Downvoted because this is not a question “about LibreOffice, TDF, and related matters.” - Ask/Getting Started - The Document Foundation Wiki