Don't get lost: Magento Connector Install Guide > 2 - Magento Setup > 2.3-Installing-Sage-Field

Installing the Sage Field Lengths Extension

The Sage Field Limits Extension for Magento ensures that any data imported from your site is compatible with the SQL structure found in Sage 300 or Sage X3. Additionally, this plugin allows you to manually configure all of the field lengths to comply with SQL changes made in Sage, or other ERP platforms.

To download this extension, visit the Magento Connect page at:

http://www.magentocommerce.com/magento-connect/field-compatibility-for-sage-300-erp-and-sage-erp-x3.html

If you received this extension outside of purchasing it at Magento Connect, it can be installed directly by copying the app folder from the extension archive directly into the root of your Magento installation (Typically the public_html folder).