Assuming the "SD adapter" on your board is using the hardware SPI controller, then the pins on the ISP connector are the same pins already being used for the SD card. You could potentially add additional devices to that SPI bus by using seperate chip-select signals, however I can't say whether this will impact the ability to use the SD card as
In this one, we look at SPIFFS (SPI Flash File Storage), which is used for storing larger data in the form of files. Think of SPIFFS as a very small SD Card onboard the ESP32 chip itself. By default, about 1.5 MB of the onboard flash is allocated to SPIFFS. You can see that for yourself by going through Tools −> Partition Scheme. SPI is a common communication protocol used by many different devices. For example, SD card reader modules, RFID card reader modules, and 2.4 GHz wireless transmitter/receivers all use SPI to communicate with microcontrollers. One unique benefit of SPI is the fact that data can be transferred without interruption. If you just need a megabyte or two of extra storage for a project, we recommend an Adafruit SPI FLASH Breakout. The breakout is single-channel SPI only, but it comes with level shifting so it can be used safely with 3V or 5V power and logic. You can address them as a flat memory space or, if you like, format them with a filesystem like littleFS or FAT.
You can use SPI to write data directly to SD card, as @MarcusMüller suggested here. All you need is SD card socket, and later a USB reader to transfer from card to PC. Alternatively you can use robust storage technology like FRAM to store data temporarily and then transfer it to PC via any interface you like.
SD pull-up requirements apply to cases where ESP32-S3 uses the SPI or SDMMC controller to communicate with SD cards. When an SD card is operating in SPI mode or 1-bit SD mode, the CMD and DATA (DAT0 - DAT3) lines of the SD bus must be pulled up by 10 kOhm resistors. SD cards and SDIO devices should also have pull-ups on all above-mentioned Refer to storage/sd_card for further details. Initialize the SPI bus properly by spi_bus_initialize(). Tie the CS lines of all other devices than the SD card to idle state (by default it's high). This is to avoid conflicts with the SD card in the following step. You can do this by either: Attach devices to the SPI bus by calling spi_bus_add LN9Z.
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    • spi flash vs sd card