The Checks Per File option applies only to check or remittance processing. This parameter controls how many check images are written to a file before the file is closed and a new file is opened for writing. The benefit of this feature is the reduction in the number of files stored to disk for check images. Files created this way are not compatible with standard TIFF viewers since the images are concatenated together into the file. The default value of 32 is the optimal value for check processing and should not be changed.