It sounds like you want two things, although you only suggest one...
- how much data is being created?
- where is the data being stored?
First, in "Getting to know your database, 101", use the Documenter. (From the menu, "Tools" -> "Analyze" -> "Documenter") This tool is absolutely essential in that it reports information on...
- tables (ODBC linked, fixed-linked, etc)
- field names and properties
- security
- relationships
- date table was created and last updated
- indexes
...But sadly, does not report number of records or transactions
...Warning - the reported generated can be 100's of pages long. It may take some serious resources to run.
Another really useful tool is the Relationships gui window (from the menu, "Tool" -> "Relationships") Gives you a graphical representation of the schema.
As far as tracking transactions. You can create some simple tools...
- SELECT Count(*) FROM TableName to gather record counts. Running this peridocally will give you a sense of usage
- If there is a date field on the table, you can use the Date field to report historical activity, SELECT Count(*) FROM TableDate WHERE Month(DateField) = ...
or... GROUP BY Month(DateField), etc
To get an idea on the size of data a table has, add up the size of each field (and text fields and objects are tough to guess-timate) * number of records + space used by indexes + some administrative over head.
Although this is not specifically want you want -- to see the data being written -- it should help you accomplish the administrative tasks required of you.
Good luck.
Richard