I will update the following folder for the updates  (from official 0.278 to the next official release 0.279):

https://bda.retroroms.net/downloads/mame/update/

https://mega.nz/folder/CMsFzKKA#HQRaZAMUBELOAlruLgYPjQ

Don't search/post here stuff that is already added to 0.278 or earlier!