# SD card showing as not detected after 24 hours **URL:** \ **Category:** Troubleshooting\ **Created:** [March 24, 2023, 11:52pm UTC](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002 "2023-03-24T23:52:41Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Joe\_Colombo](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/joe_colombo/32/2210_2.png) [@Joe\_Colombo](https://community.purpleair.com/u/Joe_Colombo)\ **Post date:** [March 24, 2023, 11:52pm UTC](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002/1 "2023-03-24T23:52:41Z")
I’m a new Flex user who has been running a sensor for about 2 weeks now. I installed an SD card, ensuring its read/write speed and card storage size was compatible with my Flex. The SD card is detected when I boot up the device, but within 24 hours, according to the online map, the SD card is not detected anymore. When I power cycle the device, the card can be detected again. And then the next day it’s showing as not detected. Any idea what’s going on and how I can troubleshoot this? ---
**Author:** ![Brian\_PurpleAir](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/brian_purpleair/32/2898_2.png) [@Brian\_PurpleAir](https://community.purpleair.com/u/Brian_PurpleAir)\ **Post date:** [May 5, 2023, 9:26pm UTC](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002/2 "2023-05-05T21:26:29Z")
Hello Joe\_Colombo, Do you still need help with this? If you do, you can contact us at [contact@purpleair.com](mailto:contact@purpleair.com) and send us your device ID so we can troubleshoot this for you. ---
**Author:** ![MatiasReinaudi](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/matiasreinaudi/32/1713_2.png) [@MatiasReinaudi](https://community.purpleair.com/u/MatiasReinaudi)\ **Post date:** [July 24, 2024, 2:47am UTC](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002/3 "2024-07-24T02:47:16Z")
Hi Joe, my name is Matías, and I am a user of PA sensors. I would like to know if you have been able to resolve the issue with the SD card recognition, as I am having the same problem with 2 of my 3 sensors. We look forward to your response and remain in contact. Sincerely. ---
**Author:** ![Kieran](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/kieran/32/6220_2.png) [@Kieran](https://community.purpleair.com/u/Kieran)\ **Post date:** [July 26, 2024, 8:40pm UTC](https://community.purpleair.com/t/sd-card-showing-as-not-detected-after-24-hours/4002/4 "2024-07-26T20:40:24Z")
Hi @MatiasReinaudi We suggest using our [Utility’s merge tool](https://community.purpleair.com/t/the-purpleair-utility/673#merge-and-clean-sd-card-data-7) on all of the files on the SD cards to see if data was inadvertently recorded even when no SD card was detected. Additionally, are you using these devices offline or connected to the internet?