Never trust a single-click "magic link." The gangsters of GTA San Andreas might be fictional, but the gangsters running shady file-hosting sites are very real.
If you want safe portability, buy the mobile version from the Google Play Store or use Netflix. If you want the moddable, classic PC experience on a USB drive, buy the PC game and use community tools like SilentPatch to make it "portable" yourself. gta san andreas portable link
Furthermore, as and ASUS ROG Ally become mainstream, the need for a "portable link" diminishes. You can install the Steam version directly onto your handheld SSD and play natively. Never trust a single-click "magic link