Re-phrasing your question to reflect your real problem:
How can I read my extensive, HTML-formatted documentation on my Android device?
there is an answer which would make it easy, comfortable, and even less storage-consuming:
You could convert the entire documentation to an eBook using Calibre on your PC. A good format would be e.g. ePub. As a result, your entire documentation would be packed into a single file. Now check the playstore for a nice eBook reader (my recommendation: Moon+ Reader or its payed version, Moon+ Reader Pro), and install it on your device. Et voila: You have your documentation available on your device. Added pluses (with Moon+ Reader): You can even set multiple bookmarks, highlight text, make annotations. And due to the integrated OPDS support and even pre-configured online libraries, you'd have a bunch of books at your fingertips.

Adding a dictionary app like ColorDict Dictionary Wikipedia or Fora Dictionary plus some (freely available) dictionaries, you could even look up things whenever needed, online or offline, as the second screenshot2 shows.
/mnt/external1
isn't the same as the/mnt/sdcard
in the URI you have. Assuming you've accounted for that, doesfile://localhost/mnt/external1/mysite/index.html
work? – Matthew Read Oct 17 '12 at 16:57/sdcard/
as the file path in a file browser but if you try to open the file then the path is given as/sdcard0/
. It's common with phones that don't have an SD slot so maybe it's the issue with your phone. – Michael Celey Oct 17 '12 at 17:34