[Q] note 8 buttons flash after 4.2.2 update and strange files topic

Hi I just updated to 4.2.2 and have noticed that the menu and back buttons flash every so often , anyone else have this , and aso seen that there is a file called emulatedwith 2 items in it a - file called O or 0 with a size of 5,65GB
and a file called legacy with 84 items in it with a size of 5,65 GB

thanks for any info