Hi & **WELCOME**! A couple of LQ'notes': you can click 'Edit' button, to 'fix' a post!
When you posted a reply to #1, it knocked it off of '
ZRT visibility'; that's another reason it got overlooked [sorry]
Is it an SD card or USB 'drive'? Were you trying to say that netbook has no hard-drive?
Did you have a BIOS setting in the eeePC (model? I have 1000HA!), to make it boot from SD?
Maybe that reverted to HD when you powered it off. Or maybe it's trying to boot from PHONE! as a USB drive...
Can you provide more details on "now I get this error every time I turn it on"?
Maybe you can post/upload an actual *picture* taken of the screen, to this Thread here!
Best wishes... Tell us more...