Hi Deadbeat. We actually use the same software that Barclays provide. However the problem is that their "unlimited" package isn't unlimited in the slightest, but actually has a 5GB fair usage limit and charge £3 per GB afterwards.
(Check out their T&C's
http://www.barclaysecure.com/legal point 6. "Where Your usage of the Software and Service exceeds a storage level of 5 Gigabytes before compression at any time during a month, You will be charged £3.00 excluding VAT for each additional Gigabyte used (before any compression occurs) or part thereof (�Usage Charges�). Any such charges will be added to Your next payment due to Us.)