We will replace (free) any newly purchased media that contains damaged files to assure correct functioning. The files are intended to be copied onto your computer and it is recommended that they be copied to a second location as a backup. The flash drive can then be erased and used for general purposes. If you need a replacement flash drive at a later time we provide a replacement for $10 + shipping. (This is also a way to obtain current upgrades.) This is available to existing customers only for courseware purchased directly from us or an authorized dealer. Please specify which courseware you would like to replace in the purchase notes and/or an accompanying email, together with any information that will help us to find you in our customer database.