It looks like you’re asking for a report on the phrase "full install hizashi no naka no ds rom" — likely referring to the Nintendo DS visual novel Hizashi no Naka no Riaru (ひざしのなかのリアル, sometimes translated as Real in the Sun or similar), combined with the idea of a “full install” for a DS ROM.
Downloading a ROM of a game you do not own is technically copyright infringement. However, the concept of Abandonware and Digital Preservation is significant here. Because the game is no longer in print and the Nintendo DS eShop is closed, accessing the game physically is difficult and expensive. full install hizashi no naka no ds rom
Prepare the Card: Depending on the flashcart, you might need to format an SD card and install drivers or software. It looks like you’re asking for a report
(fan-made) project rather than a commercial release, it cannot be installed through official Nintendo channels. Instead, it requires a console capable of running custom code, such as a DS with a flashcard or a modded 3DS. Requirements : A Nintendo DS, DS Lite, DSi, or 3DS. Because the game is no longer in print
Unlike PlayStation, Xbox, or PC games, a standard Nintendo DS cartridge does not require installation. The DS has no internal hard drive or flash memory for storing full game data (except for save files, stored on the cart or a tiny internal chip).