By default SharePoint has a limit of 50MB per uploaded file. This value can be changed via the SharePoint Central Administration console.
Select Start | All Programs | Microsoft SharePoint 2010 Products | SharePoint 2010 Central Administration. Right mouse click on the program and select Run as Administrator from the menu that appears.
Accept the User Account Control dialog that appears by pressing the Yes button.
When the SharePoint Central Administration is display select Manage Web Applications from under the Application Management section in the top left.
Select the Web Application you wish to change by clicking on it once so it is highlighted. From the Ribbon menu select the pull down arrow below the General Settings button. From the menu that appears select the General Settings option.
Scroll down the window that is displayed until you locate the Maximum Upload Size section.
Adjust maximum file upload size to the desired amount. Scroll down to the bottom of the window and select OK to save the changes.
Exit the SharePoint Central Administration.