Hi @Amy1349
You're on the right path! In the filter expression you need to add the column name and the OData operation (greater than (gt), greater or equal than (ge)). So you would write something like this in the filter query expression:
modified ge addDays(utcNow(),-7)
You should use ISO 8601 format for dates and times (yyyy-mm-ddThh:mm:ssZ) and the expression addDays returns dates in that format.
Hope that helps!
Ferran