SD CARD CCS C

[temtronic]

it's because you MUST fix the hardware !
You must install 'logic level ' translation between the SD device and the PIC.
As Mr. T has pointed out the 3v SD can't send a '1' to the 5 v PIC.
NO code you try will work.

You must correct the hardware first THEN the software will work....

[Ttelmah]

Critical difference.

If you look at the SD module he is using there, it has level translator
hardware feeding the SD signals.The chip on the right (U1), has the
resistors necessary to pull up the SD lines, and this chip is level shifting
the signals for the SD. This is a properly designed module to drive an SD
from a 5v processor.
The LCD board you have does not have this level shifting. If you enlarge
the picture, you can see that the SD signals go directly to the connector pins.
No level shifting. Hence it _wiill not work_ (with a PIC).
The module he is using is this one:
[url]
https://www.switchelectronics.co.uk/products/micro-sd-card-mini-tf-reader-module?currency=GBP&variant=45334952280373&utm_source=google&utm_medium=cpc&utm_campaign=Google%20Shopping&stkn=bbf1d20e1ed7&gad_source=1&gad_campaignid=20470999819&gbraid=0AAAAAqEgT0CyMF-25WdEaLvA6rjxVP_Wh&gclid=Cj0KCQjwmqPDBhCAARIsADorxIZrqT-NdxVCAXBV5bapVpWcNwJ4IRAveNBVq68KcF-ezTsJQVbY0WEaAtS_EALw_wcB
[/url]

It is rather like putting diesel in a petrol car. Will not work, and can cause
damage.

As Jay says, you need to get the hardware right first. Software cannot fix
incorrect hardware. You can either add your own level translation
hardware, or switch to a module that does have this.