How can I read/write bytes to SD card slot of MC60A?

Question

I am working on a clickBoard with MC60 A GSM module from MikroEletronika company.

This clickBoard has two slots: (1) one for SIM card and another (2) for micro SD cards. I have read all the available documentation: AT commands user guide manual (Quectel documentation) and some code examples (Libstock) and i still cannot find any information about how can I communicate with SD card slot.

The only thing I've found about this topic was on quectel hardware guide:

The following are the main features of SD card interface: - Only supports 1bit serial mode; Not support the SPI mode for SD memory card - No support multiple SD memory cards - No support hot plug; The data rate up to 48MHz in serial mode - Support for memory cards with maximum capacity up to 32GB;

From this I assume it is a serial communication. So, with the info I know, the two questions I have are:

1. Can I write/read bytes with the usage of AT commands? If yes, which AT commands?

2. It is necessary any specific format for micro SD card (FAT, exFAT, FAT32 or NFTS)?

Answer 1

I sent an e-mail to quectel manufacturer and they sent me a specific document for FILE AT commands. Here. For some reason, neither MikroEletronica or quectel have this file available on MC60 datasheets.