linux - VBox Guest Additions ISO can't be mounted because of VERR_PDM_MEDIA_LOCKED - Super User
package management - How to increase Ubuntu small screen size in Oracle VirtualBox? - Unix & Linux Stack Exchange
Unable to mount VirtualBox Guest Additions as a guest (Win7 host) - Ask Ubuntu
Linuxys: [Solved] Virtualbox: Could not mount the media/drive
超電筆記- HackMD
Ubuntu update sonrası VBoxGuestAdditions sorunu (unable to insert the virtual optic disk — VERR_PDM_MEDIA_LOCKED) | by Emel Ergelen (Yıldırım) | Medium