Multispectral Landsat data in ArcGIS Pro

[FarnazKamyab]

Hi everyone, I am trying to use the Landsat images within the ArcGIS pro (living atlas) I have picked my scenes in my AOI. I am trying to mosaic them by the "mosaic to new raster" tool fails, after a long time trying to save the dataset. I can't also export a raster from the scenes since they're too big and when I reduce the column and row size the exported raster looks nothing like the scene or even a part of it. I have the layers in my content panel but I can't do anything with them! I need to mosaic them and then run an NDVI on them. Can someone help me, please?

[DanPatterson]

How big? 

Are you getting an error message?

Do you have enough memory to complete the task?

[FarnazKamyab]

This is the message I get, I try to mosaic my data either from the internal Landsat images or the imported composite band images it's not working.

[DanPatterson]

how big are the rasters? and what is your memory?

Contact Tech Support if your process fails with smaller raster datasets