Failing to write to SD card using SD.h
The Sparkfun pressure sensor has a 3.3V chip and a SD memory card is also 3.3V. Your Arduino Nano is probably a 5V board. How did you connect those to the board ?

When your Nano board is 5V, you need a SD module with a level shifter for the signals.

To make it work, test either the SD or the sensor and try to make it work. When testing the SD, don't connect the sensor and don't even include the sensor library.