At one time, I had a few snapshots created and not deleted, which started to take up space on the server. I can not delete them now. I stopped the vm, created a snapshot and used "Delete All" in the Snapshot Manager. The .vmx now points the virtual disk to the xxx-000004.vmdk file (before that it pointed to xxx-000002.vmdk - something has happened a few weeks ago and some initial snapshots disappeared back then from the Snapshot Manager window).
Now, there's only 2 Gb (see screenshot) left in this datastore and I need to commit everything back to the main file without loosing information accumulated since June. Couple more pieces of info:
I only have remote access to ESXi 4, so couldn't easily install anything on it myself.
I have a second datastore that I don't really use or need right now.
I have a .ova template exported three days ago.
What can I do to free up space and yet not loose changes to the flat file?