Error! You must javascript enabled to use this form. Please enable Javascript in your browser. Optimizing QuickBooks Data Files for Optimum Performance Experts recommend that QuickBooks data files larger than 500MB need to be optimized every 6 to 12 months to ascertain they run at top performance. View full press release Your Name: Your Email: Subject: Question: We respects your privacy, the information you entered above will not be used to send unsolicited email, and will not be rented or sold to a 3rd party. Your contact information will be shared with the recipient of this message - Privacy Policy Send