Windows 10: Black screen - please insert the external media and press ok

How big of an external drive do I need for windows pro but is home use?

:)

 

Error: Please Insert The External Storage Media And Press Ok

My computer, HP 14-an013nr, said to do the Windows 10 update, but the storage was full so it suggested an external storage device... The problem is that now after using a usp drive and following the steps it is unable to reinstall the previous version. I've
tried this multiple times and even when it says "Restoring the previous version of windows" it always comes back to the "error please insert the external storage media and press ok" message. I can no longer use the computer. It will do NOTHING. It won't restore
the previous version of windows and only shows a black screen with the error message. Is there a way to save the thing or is it lost?

 

Errorlease insert the external storage media

I'm getting this : error: Please insert the external storage media and press ok ......black screen in background and the " loading dots going in circles"

 

error please insert the external storage media and press ok

When opening my computer (HP 14-an013nr, I think) it said to do the Windows 10 update, but the storage was full so it suggested an external storage device...so I bought a usb flash drive. Now after waiting forever, the update failed (not a shocker as this
is the second time trying). The problem is that now it is unable to reinstall the previous version. I've tried this multiple times and even when it says "Restoring the previous version of windows" it always comes back to the "error please insert the external
storage media and press ok" message. This whole thing has been strange from the start. Like how an unused laptop could suddenly lack storage space for a forced update.

Edit: Thank you for the replys! But, I think the point was missed...The problem is that I can no longer use the computer. It will do NOTHING. It won't restore the previous version of windows and only shows a black screen with the error message. Is there
a way to save the thing or is it lost?