The Raspberry Pi RP2040 microcontroller does indeed have a QSPI interface typically used for connecting to external flash memory for execution in place (XiP) or for faster data access. However, an SD card interface isn't inherently linked to QSPI pins.

In your design, the SD card connections are:

These pins aren't typically part of the RP2040's QSPI flash interface. With SD cards, you often use general-purpose I/O (GPIO) pins connected to an SPI bus for communication. It's normal and common to use these pins for the SD card interface because the RP2040 supports SPI communication through its GPIO pins.

If you're using an SD card in SPI mode, the connections you've made are appropriate. If you're not using SPI, let me know, and we can explore other possible configurations.