If you prefer not to use third-party pre-patched files, the official and safest method is to patch your own firmware using the Magisk Installation Guide : Installation | Magisk - GitHub Pages

To root your running Android 8.1.0 Oreo with U1 (Binary 1) firmware, you can use specialized "root files" (pre-patched boot images) or manually patch your own firmware using Magisk. Direct Root Files (Binary 1 / U1)

: Hosts a tested A260G U1 ROOT file (specifically for build A260GDDU1ASCH ) with a file size of approximately 17 MB.

: Provides a ROOT_A260G_U1_Android 8.1.0 Oreo File from 2019 that requires installing the Magisk app after flashing.

: Features a downloadable ROOT A260G U1 8.1.0_Root .tar file specifically for this model. Manual Rooting Method (Recommended)

: Offers a dedicated A260G U1 ROOT (A260GDDU1ASCH) file that was recently updated in October 2024.