String Replacement-Acoustic Guitar-

Loosen the strings.

Cut the strings with wire cutters.

The bridge pin is removed using a winder.
※ Place a cloth under the winder to prevent damage to the body.

Insert a new string through the hole in the bridge and insert the bridge pin.

Allow some room for the strings and make a crease before you start winding.

Wind the strings from inside to outside.
※ Be careful not to wind the string in the opposite direction.

Stretch the strings.

Cut the excess string length.

Start tuning.
[Reference] How to tune a guitar

Loosen the strings.

Cut the strings with wire cutters.

Remove the strings.

Insert a new string through the inner hole of the bridge
and tie it down under the folded string.

Allow some extra length for the strings and wind up the strings.
※ 2nd, 3rd, 4th, 5th strings are inside, and the 1st or 6th strings are outside, it makes it difficult for the strings to interfere with each other.

Stretch the strings.

Cut the excess string length.

Start tuning.
[Reference] How to tune a guitar