The attorneys are also seeking a postponement of the July 15 trial date and a conference later this month to hammer out scheduling issues.
The lawyers say the volume of evidence the prosecutors have to provide to the defense is so large it would be difficult to meet the current motion deadline on Wednesday.
Edwards, a former senator and Democratic vice presidential nominee, was indicted last week on six counts of violating federal campaign finance laws.
He has pleaded not guilty to all counts.
Copyright 2023 by WRAL.com and the Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.