Firemonkey - Bitmap and memory problem in ListBox

[Massimiliano S 1]

in firemonkey I save locally (win, IOS, Android) some Bitmaps in Jpeg format and reducing the quality and size. In this way 3 or 4 Mb files become 100 or 200Kb

When I reload these files at runtime in a TBitmap of a Trectangle that I insert in a TListBoxItem, the RAM occupied is a lot, sometimes even 20 Mb. The result is that if I have to upload 150 files for a total of 20 Mb on the disk in memory I find myself occupying almost 600 Mb. Does anyone know why and how to decrease the occupation in memory?

Thanks