a "Partition" itself is not a storage location.
It rather means that the data stored is partitioned.
If you use the MOLAP storage mode, for example, you will find files per partition in the file system, and the dimensions have their own files as well in the folder next to it.
It will be something like C:\Program Files\Microsoft SQL Server\MSAS10.<InstanceID>\OLAP\Data\Adventure Works DW 2008R2.0.db\...
documented here: Analysis Services Configuration - Data Directories -
Andreas Wolter | Microsoft Certified Master SQL Server
Thanks Andreas for the prompt response.
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