{"product_id":"karta-microsd-sapsan-32-gb-u3","title":"SAPSAN 32 GB U3 microSD Card","description":"\u003cp\u003e\u003cstrong\u003eOne card, no compatibility lottery.\u003c\/strong\u003e The SAPSAN 32 GB U3 microSD card was selected for Flipper Zero, uConsole, and Raspberry Pi users. Instead of trusting the symbols printed on the card, we verified its full capacity, data integrity, and real operation with Flipper Zero and uConsole.\u003c\/p\u003e\u003ch2\u003eU3 instead of the typical U1\u003c\/h2\u003e\u003cp\u003eMany basic 32 GB cards are still rated U1. SAPSAN is \u003cstrong\u003eU3, which means a minimum sequential write speed of 30 MB\/s in a compatible UHS mode\u003c\/strong\u003e - three times the minimum performance class of U1 at 10 MB\/s. This provides more headroom when flashing an operating system and transferring data. Flipper Zero uses an SPI interface, so we confirmed its compatibility in a separate test.\u003c\/p\u003e\u003ch2\u003eTested by SAPSAN, not merely described\u003c\/h2\u003e\u003cp\u003eAs part of our internal testing, we installed the stable Momentum mntm-012 firmware on the card. Flipper Zero booted correctly and recognized FAT32 and 29.10 GiB of capacity. The card is sold without Momentum preinstalled - the installation was used solely to test compatibility.\u003c\/p\u003e\u003ch3\u003eFlipper Zero: positive result\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eSPI write for 256-1024 B blocks: 262-307 KiB\/s,\u003c\/li\u003e\u003cli\u003eSPI read for 256-1024 B blocks: 410-551 KiB\/s,\u003c\/li\u003e\u003cli\u003eofficial minimum write speed required by Flipper Zero: 260 KiB\/s.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFull capacity: zero errors\u003c\/h3\u003e\u003cp\u003eF3 wrote and read back \u003cstrong\u003e29.03 GB of data, or 60,873,440 sectors\u003c\/strong\u003e. Result: 0 lost, 0 corrupted, 0 changed, and 0 overwritten sectors. Average throughput during this full test through a USB 2.0 reader was 20.76 MB\/s when writing and 29.68 MB\/s when reading. This confirms the actual capacity of the storage medium, not merely the controller declaration.\u003c\/p\u003e\u003ch3\u003euConsole: system test\u003c\/h3\u003e\u003cp\u003eWe booted ClockworkPi Bookworm from the card directly in uConsole. The device negotiated UHS-I SDR104 mode at 200 MHz, while a fio 3.33 direct I\/O test on a 1 GiB file achieved \u003cstrong\u003e36.93 MiB\/s write and 89.19 MiB\/s read\u003c\/strong\u003e.\u003c\/p\u003e\u003cul\u003e\u003cli\u003e4K random read: 2,400 IOPS,\u003c\/li\u003e\u003cli\u003e4K random write: 523 IOPS,\u003c\/li\u003e\u003cli\u003eafter the workload: 0 MMC, CRC, I\/O, and ext4 errors.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThe test confirmed not only successful system boot, but also stable card operation under sustained and random workloads.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eFlipper Zero - firmware, applications, files, and databases,\u003c\/li\u003e\u003cli\u003euConsole - operating system storage; compatibility confirmed with ClockworkPi Bookworm,\u003c\/li\u003e\u003cli\u003eRaspberry Pi and other devices supporting microSDHC.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e32 GB, 29.10 GiB visible in testing\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003emicroSDHC\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eUHS-I\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSpeed class\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eClass 10, U3\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eMMSZ32GU3FXE4-T0\u003c\/td\u003e\u003c\/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCountry of manufacture\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eTaiwan\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003ePackage contents:\u003c\/strong\u003e 1 × SAPSAN 32 GB U3 microSD card, without preinstalled firmware.\u003c\/p\u003e","brand":"SAPSAN","offers":[{"title":"Default Title","offer_id":53400330961232,"sku":"MMSZ32GU3FXE4-T0","price":79.0,"currency_code":"PLN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0516\/0144\/0953\/files\/sapsan-microsd-32gb-u3-transparent.png?v=1786803491","url":"https:\/\/sapsan-sklep.pl\/en\/products\/sapsan-32-gb-u3-microsd-card","provider":"Sapsan Sklep","version":"1.0","type":"link"}