Treat it like any external drive, and once you are done, remove it correctly.
I suggest creating a folder on your pc, and periodically copying all of the SD card contents to that folder.
Eventually, your SD card will fail. They all do sooner or later. They are only built for so many read/write actions. This makes an easy backup to get your radio back running.
You might want to also get a bigger card if you are going to do any recording. I recommend never using anything worse than a class 10 card.
I would also recommend downloading a free copy of SDFORMATTER from the website of the same name. It does a better job of formatting new cards for use than Windows.
Mark
WS1095/536/436/996P2/HP1e/HP2e/996XT/325P2/396XT/PRO668/PSR800/PRO652