"Your website has exceeded its bandwidth allowance"

[#1]

The last two months I received a message three times from the so-called Plusnet Abuse Team saying that my website has exceeded its bandwidth allowance. Each time I checked my own traffic and web-space usage, and each time I was way under the limit: in transfers, 4.17 Gb out of 250 Gb; web space, 80% unused. Luckily, because the excess wasn't, well, excessive, my website wasn't blocked in the hard-handed way it was on earlier occasions.
I asked each time for clarification because I don't understand the excess. A fellow sufferer suggested that I might have some very large graphic files on my web site whose downloads are (allegedly) generally not registered. But I have no big files on the site, the biggest file there is about 4 Mb. PlusNet has so far never told me what caused the excess.
PlusNet's alerts say that I might be interested in upgrading my account. I might be, but not until PlusNet show me what causes the excess. I can see no evidence of excess in PlusNet's usage-measurement tools, so I think its up to them to point out why their abuse alerts are triggered.
Peter

[#2]

Is that a typo? The daily bandwidth allowance is 250Mb.

[#3]

You might like to disable viewing the directory contents on your site:
http://www.kahrel.plus.com/indesign/?C=S;O=D
http://www.kahrel.plus.com/indesign/images/?C=S;O=D
Those pdf's don't look like good news - I hope when you are looking at the daily downloads you are dowloads by the webcrawlers which will download those pdf's.

[#4]

Bob,
> Is that a typo? The daily bandwidth allowance is 250Mb.
This is what I see on my page: "This month you've used 7.11GB of your 250GB allowance."
And there is a line next to it that says "Your usage allowance - Up to 250GB (applies between 8am - Midnight)"
There a note under a helptip that says that if I use more than my allowance, PlusNet will add 5Gb at a cost of £5. That's fair enough but hasn't happened.
Peter

[#5]

That's your broadband download allowance and absolutely nothing to do with with your website traffic allowance which is as Bob stated!

[#6]

Jelv's right, you're confusing your broadband allowance with the bandwidth allowance for your hosted website. For your website, only 250Mb of transferred data is permitted each day. This is basically people/web crawlers visiting/downloading things from your website i.e. if I downloaded scriptui-2-8.pdf from your website 120'ish times in a day, it would take you over your allowance.

[#7]

Aha, thanks for clarifying that.
> You might like to disable viewing the directory contents on your site
That may be a good idea. I've looked around but couldn't find how to do that. Where do I find instructions? or could you explain?
That wouldn't stop anybody downloading files. I'll look into increasing my daily allowance.
Thanks,
Peter

[#8]

Either put an index.html file in every folder or add

Options -Indexes 

to the .htaccess file
http://bfy.tw/2l2S

[#9]

Nice one, the autotyping Google seaarch. But I'm a bit out of my depth here, so I wouldn't have known what to google for. Made for instructive reading. Anyway, since I have only three or four directories I placed an index.html file in them. Also because I couldn't work out how to deal with the .htaccess file, but a google on 'plus.net .htaccess' gave some interesting results and I'll try and work it out later.
Thanks to both of you!
Peter