Samsung devices require manual permission before accepting custom partition images. Open on your tablet.
In Odin, check AP and select the twrp_...tar file you downloaded. sm t285 custom rom android 7 free
OmniRom aims to be a that is “a lot lighter than CyanogenMod/LineageOS”. For the SM‑T285, an unofficial OmniRom 7.1.1 build exists that is lean and fast. sm t285 custom rom android 7 free