In order to add a file system counter, press the 'Add' button located on the main toolbar, selected the 'File System' counters category in the left-side view and then select an appropriate file system counter in the middle view. In addition, in order to monitor the file system in a remote computer via the network, press the 'Connect' button located in the bottom-left corner and specify the host name of the remote computer to monitor.

• File System Control Rate - this counter measures the overall rate at which bytes are transferred for all file system operations that are neither reads nor writes, including file system control requests and requests for information about device characteristics or status, which is displayed in Megabytes per second.
• File System Control IOPS - this counter measures the combined rate of file system operations that are neither reads nor writes, such as file system control requests and requests for information about device characteristics or status, which is displayed as the number of operations per second.
• File System Data IOPS - this counter measures the combined rate of read and write operations on all logical disks on the computer, which is displayed as the number of operations per second.
• File System Read Rate - this counter measures the overall rate at which bytes are read to satisfy file system read requests to all devices on the computer, including reads from the file system cache, which is displayed in Megabytes per second.
• File System Read IOPS - this counter measures the combined rate of file system read requests to all devices on the computer, including requests to read from the file system cache, which is displayed as the number of operations per second.
• File System Write Rate - this counter measures the overall rate at which bytes are written to satisfy file system write requests to all devices on the computer, including writes to the file system cache, which is displayed in Megabytes per second.
• File System Write IOPS - this counter measures the combined rate of file system write requests to all devices on the computer, including requests to write to the file system cache, which is displayed as the number of operations per second.