My understanding, after reading the help and various forum posts, is that the 'Update USB' option should only write new or updated ISOs to an existing SARDU USB, and not effect existing ISOs, or re-copy them. However, every time I use the 'Update USB' option, I am experiencing a complete rebuild of my USB, with ALL files being extracted and copied to USB again, even though I have only added or updated one ISO.
Is my understanding incorrect? Or am I doing something wrong? I have about 14GB of products on my USB, and the rebuild takes considerable time. Not to mention concerns of wear on the USB device with unnecessary writing. If I simply want to update one ISO with the latest version, how do I do so without completely rebuilding the USB?