An SSD is nice but really not necessary. Get a Samsung Endurance MicroSD card and one of these: Rocketek Aluminum USB 3.0 Portable Memory Card Reader Adapter for Micro SD Card/TF Card Reader Adapter https://www.amazon.com/dp/B06XTQZS4F

It’s extremely reliable. An SSD is faster but that will only help if you’re taking it out of the car and copying it to a PC regularly.

If you want to stay with the SSD — the difference from the T5 is that the T7 uses an NVMe SSD instead of a SATA drive. The T7 will be twice as fast as the T5. But that won’t matter for dash cam footage.