Render and replace, render but don't replace

I found it depends the location the project has. Sometimes I worked the project on my internal ssd and the render and replaces works fine but when I do the project on an external ssd instead, specially a G-drive, the render and replace, render but not replace. I dont know if maybe its about the disk format.

If you have not opened the Edit/Template/Output Module menu and fouled up the settings, all you should have to do is use the Composition/Pre-render menu and choose a folder to save the rendered file. 

Any nested composition (pre-comp) selected in the Project Panel or open in the timeline will be added to the Render Queue. The Output Module will be set to render a High Quality With Alpha movie and replace the nested comp in every composition it is in. You should never render an MP4 to use as a production master, and there is no need to fiddle with the Output Module presets unless you have an expert's knowledge of video standards, formats, and compression.

Without more specific info about your project, your system and so on we can't realyl tel lyou much, but it seems you misunderstand the function. The render & replace usage only works within AE itself, not outside it. You could e.g. render a pre-composition and have its usage replaced in the project, but the project itself doesn#t know that the original comp was used in a Premiere sequence via DynamicLink.

Mylenium