There are lots of posts on this from keeping your files in the cloud, ala dropbox, google drive or whatever. Or you can keep them on a shared network space inhouse or i keep a complete copy of my xlights data folder on a flash drive and copy it to several computers that i use. They all work fine. Works best if you keep everything in one folder, ie, media and sequence. In my xlights data folder I have subfolders for Christmas and Halloween and for special testing or for looking at a shared sequence that I downloaded. Even have multiple years data, each in a separate sub folder. then to use any particular data just change your setup to point to the folder you want. Easy Peasy. One word of warning if you use any pictures/video the path will change so just be prepared for that.