A file named VMDK-NAME-00000*.vmdk is very likely a snapshot file for the vmdk VMDK-NAME.vmdk
If you check via ssh or WinSCP you will then see that there are:
Anyway - you seem to have at least one snapshot.
From SSH on ESXi host, you could verifie your VMX file and show witch VMDK are attached on this VM.
# cat MyPathTOvmxFile.vmx | grep -i vmdk