can not create another partition without converting HDD to Dynamic Disc?

Seems you have little bit big problem, because Hard Disc Drive (HDD) with MBR Partition table can have only four partitions. therefore first check your HDD already has four partitions and those partitions are primary partitions.

if you are use the windows operation system, you can go to disc management and check HDD status.
you can identify the primary partition with dark blue color rectangular in disc manager.

Four primary partitions on windows

if your HDD has for primary partitions and if you tried to create another partition, you will be prompted to following message.

HDD Dynamic convert warning

in this situation if you badly want to create another partition you can proceed to next step by pressing [Yes] button but if you do that your disc will be converted to dynamic disk and you will no longer able to install a operating system on that disc. therefore do it with your own risk.


Install operating system on dynamic disc.

like i said before installing another operating system is not possible on dynamic disc. to do that you must remove and rewrite the partition table after that you can install a new operating system.

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