@sleve_mcdichael Thank you so much for your help.

@Retro-Arcade-Fan I have seen the product number ‎WDS500G3B0B on the amazon page. This denotes the SATA variant. Verify also here: https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-blue-ssd/product-brief-wd-blue-sa510-sata-ssd.pdf

@nicole After writing the Retropie image to the SD card, 2 partitions will be created into the card, the first one (256 MB) containing boot files and configurations for the raspberry pi, the second one, will handle the Linux operating system which Retropie works from within. The Retropie partition is unreadable by Windows.

After booting the raspberry pi with the SD card, Retropie will expand the second partition to ensure the entire available space from the card is ready. This is done only once the first time you turn on the raspberry pi with the card. Follow the steps on the screen.

Please take a look at https://retropie.org.uk/docs/First-Installation/

If you need to recover your SD card as it was before writing the image, please use:

https://www.sdcard.org/downloads/formatter/

@chris3535 You can also set up the RetroPie manager to manage RetroPie within your browser.

HTTP://<retropie_ip_addr>:8000/

@neo-rio said in Looking for SD card size advice:

Without any CD games, 128GB is all you need. I have full collections of all major systems and a few of the working experimental ones all fit within that limit.

I find that 128 GB is a bit much, and if you don't count any CD-based consoles, 32 GB is more than enough for the average user, especially if he/she isn't intending on adding full collections to the card.