Search for: Log In Register OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › sd card as hd ? This topic has 1 reply, 2 voices, and was last updated 2 years, 5 months ago by Ray. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 23, 2018 at 1:47 pm #52772 joekoParticipant hallo, i saw on an Picture that the opensprinkler Show an usd Card as present. i am confused. i thought that only the ospi use sd Cards. do opensprinkler also use sd Cards for the os ? September 25, 2018 at 1:00 pm #52801 RayKeymaster OSPi: has SD card on RPi. OS2.3 (Ethernet jack version): has SD card. OS3.0: uses built-in flash memory. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › sd card as hd ?