When working with long recordings where i have several 2GB MTS files, i always have to merge these to one file with the free Avidemux or Vegas own "import files from your camera" method.
When i don't do this, i will miss a few frames or audio cut at every 2GB segment end.
Yes, merging is a simple copy but despite my card reader and port is USB3 and target folder is a very fast M2 SSD, a 1 hour sport game still need 3-4 minutes just for joining. Do we really need this? No other "smart" method in 2023/Vegas21 which can handle these files as "one" recording on the timeline, so no gaps, no missing frames?
And for me, it's often needless to copy the video to a new drive (need space, etc), i can work, edit and render from the fast memorycard.
Vegas import command see automatically which files should be handled as one - so i hope...