My-network reconfiguration / changes after initial setup

Hi there

In my initial setup of HA I created a my-network file in CONFIG/network/ on my SD card as per below and opted to use wi-fi as it was installed quite close to my access point however I would like to now rather run on ethernet instead of wireless but noticed that when I mount the SD card on windows the CONFIG/network directory no longer exists so am I correct in assuming that

A. It only looks and reads from this directory once at initial setup and once it writes this information into the necessary files removes this directory?
B. If I want to change from wireless to ethernet I’d then need to mount the SD card and recreate this directory structure including my new my-network file?

Currently my wlan interface is 192.168.88.11 and I’d like to make the ethernet interface rather have this IP so that I don’t have change settings on all of my devices connecting to HA, I would also like to have both ethernet and wlan so would in effect make eth0 192.168.88.11 and wlan 192.168.88.12

Current Config File:

#--------------Wireless Config--------------------------------
[connection]
id=my-network
uuid=2e7b1bfd-1f55-4dc9-8a94-97c3a2b019a2
type=802-11-wireless

[802-11-wireless]
mode=infrastructure
ssid=MYSSID
# Uncomment below if your SSID is hidden
#hidden=true

[802-11-wireless-security]
auth-alg=open
key-mgmt=wpa-psk
psk=MYPASS

[ipv4]
method=manual
address=192.168.88.11/24;192.168.88.1
dns=8.8.8.8;8.8.4.4;

[ipv6]
addr-gen-mode=stable-privacy
method=auto

Proposed new config file:

#--------------Wireless Config--------------------------------
[connection]
id=my-network
uuid=2e7b1bfd-1f55-4dc9-8a94-97c3a2b019a2
type=802-11-wireless

[802-11-wireless]
mode=infrastructure
ssid=MYSSID
# Uncomment below if your SSID is hidden
#hidden=true

[802-11-wireless-security]
auth-alg=open
key-mgmt=wpa-psk
psk=MYPASS

[ipv4]
method=manual
address=192.168.88.12/24;192.168.88.1
dns=8.8.8.8;8.8.4.4;

[ipv6]
addr-gen-mode=stable-privacy
method=auto

#--------------Ethernet Config--------------------------------
[connection]
id=my-network
uuid=637051c7-f020-44dc-9465-dcf6f40c0a8b
type=802-3-ethernet

[ipv4]
method=manual
address=192.168.88.11/24;192.168.88.1
dns=8.8.8.8;8.8.4.4;

[ipv6]
addr-gen-mode=stable-privacy
method=auto

I have read through the forums and wasn’t able to find much on changing the my-network file after its initial config.