Upgrading Drupal

I am thinking through some approaches to a problem, and wanted to bounce them against experienced brains.

Here is the scenario:

* Logged in OR anonymous user can generate a "report"
* A "report" is essentially just a record of user playing with a few inputs on a page and getting a result back
* The report data is probably a few fields, some html, and pdf file that was generated by our system
* User can do this as many times as they want
* When user is logged in, they can "Save" the report (persistent in database)
* Upon future login they will see a list of these saved reports
* Clicking on it will fetch the record.
* Ability to Delete a report
* No ability to Modify a report
* This does not need to be tied into the main Admin.
* The interface should be simple and tied into front end display (not admin tabs)
* Implementing with Drupal 7

Here is what I am thinking as options:

1. Save the data in a custom field in a User Profile
2. Create a homegrown table with user id as foreign key (and use various hooks, interfaces in our custom module to do the magic)
3. Treat the Report as a custom content type. (and use node/user references to tie it together)

Hi guys,

For several days I am trying to migrate my site from Drupal6 to Drupal7, without success so far.

Hi,

I had an old 4.x installation on another website and i moved and upgraded it to 6.x. You can found the upgraded version on this link:
http://66.147.235.132/~freeonli/drupal-6.20/

Hi Everyone,

I've Just joined the forum, I've managed to do one site in drupal
and so far so good works really well.

Anyway, I just wanted to pick some brains. I'm in the process of developing a
ecommerce site with drupal 7 (not sure wether i should use ubercart of commerce).
I'm actually running the site in offline mode while I mess around adding new modules and content just to see how I get on.

After trying to upgrade from 6.20 to 7, I have the following error messages in pink with a red do not enter sign in the margin,
it appears in the administration section under modules
error:
Field is part of a circular dependency. This is not supported and you will not be able to switch it on.
Field SQL storage is part of a circular dependency. This is not supported and you will not be able to switch it on.

Hi there,
I am very very new to drupal and do not have a developers background. There are a number of Modules I want to install on my drupal site but I get a warning that they can't install b/c I need PHP 5.3. Evidently I have PHP 5.2.14. Can someone help me update to 5.3 (step by step) and tell me more about what this even means. I have looked around and cant seem to find an answer or place to even download it? Thank you in advanced.