@garp
Please stop 'polluting' all threads about ubiboot/sailfish/nemo/... with the same question(s) over and over.
They all are not really related to the topic but to low-level IT questions. I would encourage you to open up your own thread and ask there again.

To your question: the * (star) stands for some characters distinguishing different releases, thats all. So yes replace with characters of the image file you downloaded.
For the rights I just may guess that partition was created as root and user does not have write access (how to overcome use google or another thread please); or maybe just created partition and gave no file system?