FOLDERS
FOLDERS
FOLDERS
MyPrefix to be added (When trying to affect Folders)
for /d %a in (*.*) do ren "%a" "MyPrefix%a"

Mysuffix to be appended (When trying to affect Folders)
for /d %a in (*.*) do ren "%a" "%aMySuffix"

FILES
FILES
FILES
MyPrefix to be added (When trying to affect Files)
for %a in (*.*) do ren "%a" "MyPrefix%a"

Mysuffix to be appended (When trying to affect Files)
for %a in (*.*) do ren "%a" "%aMySuffix"




Remove MyPrefix (needs POWERSHELL)
get-childitem * | ForEach { Move-Item -LiteralPath $_.name $_.name.Replace("MyPrefix","")}