The Others, Other, Other Than That
expression
その means "that" or "the", and その plus other means things like the others, other, and other than that, depending on the context.
そのほか, そのた
This has two readings, but luckily you learned one of them when you learned the kanji, and the other one when you learned the word 他. The two readings are usually interchangeable, too.
その他のゴミはリサイクルして下さい。
Recycle the other kinds of trash.
その他色々なタイプありますよ。
There are many other types than this.
その他に元パートナーへ言いたいことはありますか？
Is there anything else you would like to say to your ex?