When installing Grub to a windows 7 install USB I get this error

Question

I followed everything correctly but when executing the last command I get this error

grub-install: error: cannot find EFI directory.

So far I have followed these steps

1. Format your USB drive as NTFS using GParted
2. Copy all files from Windows ISO to USB drive using your favorite file manager
3. Install GRUB on USB: sudo grub-install --root-directory="/media/" /dev/sdX

I ran the command like this

sudo grub-install --root-directory=/media/christian/45A1483D795F007F/dev/sdb

Note: The drive I am running is slowly failing. A file could be corrupted! Please don't just assume this is the problem though.

Ugg I am totally stuck on this!

Thanks

UPDATE

I was doing something wrong! After /media/drive I put /dev/sdb without a space! After putting a space I now get this error

grub-install: error: /media/christian/Windows 7/ doesn't look like an EFI partition.

Answer 1

1. Avoid at all costs file paths that contain spaces. So give your USB a label without spaces!
2. The root-directory value is incorrect. You must specify the USB mount path, not its UUID.
3. Read this again and don't forget the target argument.