Sana nga virus lng pag nag kataaon pahirapan na mag lagay ng mga moded games or appSa Android R siguro merong rules kung saan may limitations ang folder, maybe its corona various kaya ang sabi "Please remove your personal files FROM THIS FOLDER as soon as possible". Virus siguro or not compatible. I dont know, kung mahalaga ung laman nyan paps wag mo iremove. Kung puro junk files lng yan, idelete mo.
Or pwede mo itry different File Manager like Es Explorer, ZArchiver, RAR, etc.