Depends on your OS. Mac OS X, check:<p>&#x2F;Users&#x2F;username&#x2F;Library&#x2F;Application Support&#x2F;Adobe&#x2F;Common&#x2F;Media Cache Files
&#x2F;Users&#x2F;username&#x2F;Library&#x2F;Caches&#x2F;Adobe&#x2F;Lightroom&#x2F;Video&#x2F;Media Cache Files<p>Windows, you&#x27;ll have to trawl this thread for probable locations:<p><a href="https:&#x2F;&#x2F;feedback.photoshop.com&#x2F;photoshop_family&#x2F;topics&#x2F;lightroom-6-2-1-video-cache-is-out-of-conttrol-major-bug-report" rel="nofollow">https:&#x2F;&#x2F;feedback.photoshop.com&#x2F;photoshop_family&#x2F;topics&#x2F;light...</a>