ok ok as your friend @ told you...you have a lack of space and therefore the MSTMS program cannot save the patch inside your Tomtom, because there is no space!
so you need to free up space in your tomtom, what should you do?
simple... use MDC, MyDrive Connect and delete the European map you have now or any other map and put a small map in its place (example: Albania, Switzerland or similar), then exit MyDrive Connect and now you will see that you can install the patch without problems ...once the patch has been installed, put the map you want in the micro SD, don't put large maps in the internal memory, but use the SD!
your tomtom gives you the possibility to use and install maps from all over the world, so use MDC to put the small map inside the internal memory of your tomtom...use the SD instead for large maps, many GB in size!