MicroSD with STM32 and SPI mode - pull-ups and EMI filters
Yes, it reads in the SD specs that unused pins must have pull-ups. The pull-ups are not according to specs, 4k7 is too strong. And it does not make any difference if they are at the connector or MCU end. I don't see bypass caps for the card so you should add them.

What would EMI filters improve here, does it radiate too much EMI out? It would not affect communication between MCU and SD card much; it would only help if you have bad design that radiates too much, and that should be preventable also with other means so adding EMI filters is only band-aid for problems elsewhere.