As indicated on page 3 of the I-20 and page 2 of the DS 2019, International Students are expected to carry certain documents with them at all times. It is recommended that you have copies of the following with you:
Students should ensure that they have both physical copies (in a safe location) as well as digital copies readily accessible in the cloud and/or available in their email.
Students should also ensure that they update International Student Affairs with any material changes (address, name, major) within 10 days of the change.
More information can be found on this NAFSA Document Requirements page.