YES, very important to use the original case. You should always use the Styrofoam case that the drone came in originally, when you ship it to DJI for any reason. Otherwise you're taking a huge risk of poor packing by DJI when they return your drone. DJI will not send you another Styrofoam case if you don't return your drone in the original Styrofoam case. That's it's primary purpose in life, don't ever throw it away. Also, you should never buy a used drone without that case, IMO.