3 Replies Latest reply: Feb 10, 2014 12:45 AM by Wadge
Wadge Level 1 (0 points)

The original video files were created and stored in a WD external hard drive using my 2012 iMac OS Mountain Lion. Will appreciate assistance on this...thanks.

MacBook Pro with Retina display, OS X Mavericks (10.9.1)
  • sberman Level 7 (32,476 points)

    I don't know specifically the answer for iMovie.  But I can tell you in general that as software versions advance, each successive version's data requires more space than the previous version.  Generally, more information is kept.

  • babowa Level 7 (29,970 points)

    It also depends on the compression format used as well as the file format - are the videos 1080 or 720p full HD or ? Adding anything will increase the file size; I generally shoot in 720 HD and can easily amass 150 GB of temp files while putting together a project, but then I try to process it as losslessly as possible.

  • Wadge Level 1 (0 points)

    Thanks for your quick replies. All the stored videos are events that I haven't yet converted to projects so the files are large. They are compilations of my all my analog tapes since the mid-80"s that I converted to digital using my 2012 iMac desktop. I must have about 2TB on an external hard drive. So will i need another 2TB external hard drive to store the new library that will be created by the iMovie of my 2013 Macbook Pro Retina with OS X Maverikcs?