File Explorer is a app.

File Explorer is preinstalled.

View options

View > Show > File name extensions

Hide removable drives from the top level
run elevated:
```
Remove-Item -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\DelegateFolders\{F5FB2C77-0E2F-4A16-A381-3E560C68BC83}"
```
to revert the change:
New-Item -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\DelegateFolders\{F5FB2C77-0E2F-4A16-A381-3E560C68BC83}" -Value "Removable Drives"

Setup icon paths

Link the icon folder to the system-wide symbolic link C:\FI\
run elevated:

New-Item -Path "C:\FI" -ItemType SymbolicLink -Target "D:\OneDrive\Designᴱ\Folder Iconsᴰ\ico"

Set custom icons for files or folders if desired
- Right-click > Properties > Customize > Change Icon…
- C:\FI\ ← Type the path and use autocomplete