You need approximately 100 MB of free disk space to hold the Acquire executables, plus typically 20 MB of free disk space per system to hold captured data. Note that the amount of disk space required to hold captured data is related to factors such as the number of targets from where data is being captured, the frequency of data capture and the complexity of the workload on the target system, and is therefore difficult to calculate accurately in advance. For example, if you use the WMI feature to capture data from 10 systems, you will need about 20 MB for each one on the system performing the capture, or about 200 MB in total.