Does SD really speeds up the editing and sharing FCPX?

If I understand correctly, your internal drive is a rotating HD, is that correct?

That would be the limiting factor when copying files. Your external may be able to move data at, say, 500MBps, but your internal is much slower. That is why copying large files takes the same time - again, the internal drive is the bottleneck. If it can't serve the data at more than, say, 150MBps, then it can't possibly saturate the USB bus.

On the other hand, if you put your library and media on the Crucial drive, you should be able to edit buttery smooth.

It may be worth posting an Etrecheck report so we can check for other possible issues.

The speed of the drive is not relevant to the speed to rendering. The media is delivered far faster than it can be processed.

Please give the complete requested information. Crucial, Samsung, Seagate make dozens of devices with different capabilities. The computer and the connection ports and cables are absolutely critical to performance.

That is because that plugin is very processor intensive. As Tom said, in this circumstance the drive was not the bottleneck, the cpu and/or gpu was.

With those USB connectors you’re basically reducing the drives to parity because they’re going through the same bottleneck.

What computer is this? How exactly are the drives connected? What drive models are each of these?

Girshon Rutstein wrote:

My library and my media are always on the external drive. Is it possible to replace HDD with SSD drive, and is it hard to do?

While it is possible to replace the hard drive, it is definitely not easy to do.

And, since your media and libraries are already in the external SSD, replacing the internal HD with an SSD would do very little in terms of editing performance.

It is unclear to me what the problem actually is, or if there is one. The only thing that you mentioned that could indicate a problem is dropped frames - but you did not say if this was an occasional thing, or what. An occasional dropped frame is no cause for concern, whereas if the system cannot playback anywhere near real time, that is another matter altogether.

If you turn off all the warnings about dropped frames, are you able to notice anything? If not, just use the application and don't worry.

In Preferences->Playback, UNcheck the box that says: "If a frame drops, stop playback".

Are you then able to edit normally?

Can’t you use Thunderbolt 3 connections?

If you mean "SSD" (solid state Drive) then yes,it should make a noticeable improvement in the speed of your program.