I needed a way to save the ListView and then load it back again, and I found this easy method, which works great.
Originally found on. programmersheaven.com«.
Had to be modified a little to work in Delphi 11.

The file will be saved in the folder where your app is running or installed.
If you want it saved in another location, you will have to specify that in the
S.SaveToFile('List.txt');
to this (A folder within your apps folder (Notice the Forward slash))
S.SaveToFile('MyFolder/List.txt');
or this
S.SaveToFile('C:\Program Files (x86)\MyProgram\List.txt');
procedure TForm1.BtnSaveListClick(Sender: TObject); var S : TStringList; i : integer; begin S := TStringList.Create; for i := 0 to ListView1.Items.Count-1 do S.Add('"'+ ListView1.Items[i].Caption +'","'+ ListView1.Items[i].SubItems.CommaText + '"'); S.SaveToFile('List.txt'); S.Free; end;

procedure TForm1.BtnLoadListClickClick(Sender: TObject); var S : TStringList; i : integer; begin S := TStringList.Create; S.LoadFromFile('List.txt'); // First load the file ListView1.Clear; // Clear the view for i := 0 to S.Count-1 do // Add all loaded items to the list with ListView1.Items.Add do begin SubItems.CommaText := S[i]; Caption := SubItems[0]; // Set the caption to the first subitem SubItems.Delete(0); // Remove the caption end; end;