Hi @zibi8606, welcome to the forum!
There is nothing wrong with your post, but I mention the following to any first-time poster:
Please read How to get the best out of this forum, if you haven't done yet.
Yes, you can use your display with an SD card. There are cheap SD card modules you can add to your AVR Arduino. You can connect it also to the HW SPI lines, just use a different pin for CS than for the e-paper.
Please take a look at README.md to see how GxEPD2 allows you to use buffered graphics and text with small RAM processors.
Jean-Marc