Calculate data storage in hours based on camera specs

Job ID: 31330203

Budget: $10 – $30 AUD

I need someone to calculate how many hours video footage i would get with the following inputs.

You need to deliver:
1) the working calculations in Excel (so i can change values) add some notes to calculations as required / step by step
2) the final estimate.

Specifications:
4k UHD (3840 x 2160px)
30 FPS
Data Rate: 60 Mbs
Saved Video Format: MP4 (H.264)

Recording onto micro SD card: 128GB