To see if your VM uses a flat VMDK:
A VMDK (Virtual Machine Disk) file is a container file that stores the virtual disk of a VMware VM. It contains the VM's operating system, programs, and data. what is flat vmdk file in vmware
A flat VMDK file is a type of VMDK file that stores the virtual disk as a single, flat file. Unlike other VMDK formats, such as sparse or delta, a flat VMDK file contains all the data in a single, contiguous block. To see if your VM uses a flat