I'm trying to delete a 1 TB folder on a Seagate 3 TB GoFlex USB drive. Each time I get systemutofmemory error after a 4-5 minute wait. Is there a folder size limit? Using Gutmann 35 passes, pseudorandom Data 1 pass, RNGCryptoServiceProvider (default settings) latest stable version 22.214.171.12420. Laptop 2.5 GHZ CPU 4 GB RAM - found if I go a level deeper in the directory I don't receive the error. There are millions of files in the TB of data, this is going to take weeks. Is there a more efficient way to purge a directory with millions of files?