Out of memory error on applying thresholding by percentile

Hi,
I have reduced the file size and tried recommended options to change the system but still getting the same out-of-memory error on thresholding by percentile of a source density map.
Please suggest me something.
Thanks!

The problem is the size of the data you are trying to process, not the process itself.
Processing the file you select requires the reconstruction of the full source matrix (number of time samples in the continuous file x number of sources), which apparently doesn't fit in the memory of your computer.
You need to import shorter blocks of data if you want to be able to process it in this way.

Note that this process "Threshold by percentile" is designed to filter connectivity matrices. It is not recommended anywhere in the documentation to use it on source results.
https://neuroimage.usc.edu/brainstorm/Tutorials/Connectivity#Threshold_by_percentile