OK so I have a 500gb seagate external, go to disk utility and erase it, now comes the sad part....Plug it into my PC that I need for school and NOTHING So, I try erasing it again and making sure it is formatted for MSDOS and still no luck. So I try partitioning and that is also no luck. 1 part for mac, other free space because no windows option was present..I really need this to work and would be REALLY grateful to whoever helps me get this solved! Thank you all so much for understanding I'm new to this forum and all so I hope I posted in the right place as well, once again thank you all for understanding and I hope to hear from you soon. <3!