持ってないんだ

don't have

→ 持つ
phrase Common #4,644
don't have An informal, explanatory way to say that someone does not have or possess something. The ending んだ adds emphasis or explanation; the polite equivalent is 持ってないんです.
JA: 今は車を持ってないんだ。
EN: I don't have a car right now.

本はほとんど持ってないんだ

I hardly have any books.

持ってないんだ

I don't have a car.

カメラは持ってないんだ

I don't have a camera.

トムスマホ持ってないんだ

Tom doesn’t have a smartphone, you know.

自転車を持ってないんだ

I don't have a bicycle.

何も書くもの持ってないんだ

I don't have anything to write with.

トムクレジットカード銀行口座持ってないんだ

Tom doesn't have a credit card or a bank account.

お金持ってないんだ

I don't have any money on me right now.

細かい持ってないんだ

I don't have any change.

水着持ってないんだ

I don't have a swimsuit.

— Hoje Eu Quero Voltar Sozinho (2014)

おじいちゃんもう運転免許持ってないんだ

Grandpa doesn’t have a driver’s license anymore.

スマホまだ持ってないんだ

I still don't have a smartphone.