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Hi all, I'm estimating a trial-by-trial GLM for a few hundred subject and several tasks. SPM writes a lot of nifti files to the hard drive which takes up a lot of space and also prolongs the estimation due to the writing process. Since I am only interested in a few nifti files (e.g. don't need the other files for the motion regressors), I don't need SPM to create all the other Nifti files. So I was wondering: 1. Is it possible to restrict SPM to only creating some nifti files and don't write the others? 2. Is it possible to store the data as a mat-file instead of nifti files? Any help appreciated! greetings David