I see 13 hard disks in the vcenter settings. Total of 280 GB is decomposed to
12 GB
1.7 GB
25 GB
25 GB
10 GB
10 GB
15 GB
10 GB
1 GB
10 GB
10 GB
100 GB
50 GB
Right now, I have 4 nodes, with 25 VMs (including one vCenter). Creating and deleting VMs are usual.
I don't know if creating/deleting VMs leave orphan and garbage files in the vCenter hard disks.
So, is there any way to analyze disk space?
Yes. 300GB is normal for tiny deployment.
Storage Requirements for the vCenter Server Appliance and Platform Services Controller Appliance
You don't need to worry about that. It does not "leave orphan and garbage files in the vCenter hard disks"
So, Is that normal for a *manager* to fill 300GB of disk for managing 26 VMs?
Yes. 300GB is normal for tiny deployment.
Storage Requirements for the vCenter Server Appliance and Platform Services Controller Appliance
Vijay responded with the link to the size requirements, but I'll also point out that if you have deployed the vCSA as a thickly provisioned VM, that size is allocated up front regardless of how many VMs you're managing. If it is deployed as thin, space is used as required and for so few VMs would not initially occupy 300 GB.