Yes,
I'm sure that at the install stage you can choose a new path for the Library (Samples), I haven't seen an installer for a while. If not, install into the default position and once it's installed, move the Library to where you want it. In Spark prefs there is a path that you will need to set if you change the default path, see image. This is so the samples are seen in spark etc etc
The default is /Library/Arturia/Spark/Spark Library/, on PC it would something like C:\Documents. Move all the contents of the folder to your new destination and marry the path up in prefs , restart and it should be good to go.
Although I personally wound't bother, it's not like they are huge audio files but it's up to you.
Hope that helps
Thanks, Stuart