Struggling please help.

[Imutchy]

Trying to build for mid August 24 wedding. Don't want to let down future wife. Wiring and soldering all done no issues. I just have no experience coding at all. See below for error message. I have looked through previous issues of the same sort of thing but I don't know what or how to download additional libraries or where/how to put them in. Need someone with real patience and step by step idiot guide of what to do rather than a "download this library and put here" explanation a more prescriptive detailed answer of open this folder and cut the text written here and then paste it into this folder here................

I live in hope of some coder whizz who can help a man in need...."nobody likes to see a grown man struggle"

Thank you in advance ........
Arduino: 1.8.19 (Windows 7), TD: 1.59, Board: "Teensy 4.0, Serial, 600 MHz, Faster, US English"

Multiple libraries were found for "SD.h"

In file included from C:\Users\Sarah\Documents\Arduino\hardware\teensy\avr\libraries\Audio/Audio.h:129,

             from C:\Users\Sarah\Documents\Arduino\sketch_aug03a\sketch_aug03a.ino:25:

C:\Users\Sarah\Documents\Arduino\hardware\teensy\avr\libraries\Audio/play_serialflash_raw.h:33:10: fatal error: SerialFlash.h: No such file or directory

33 | #include <SerialFlash.h> // github.com/PaulStoffregen/SerialFlash/blob/master/SerialFlash.h

  |          ^~~~~~~~~~~~~~~

compilation terminated.

Used: C:\Users\Sarah\Documents\Arduino\hardware\teensy\avr\libraries\SD

Not used: C:\Users\Sarah\Documents\Arduino\libraries\SD

Error compiling for board Teensy 4.0.

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