PRTG checks your hard disks


  • Hard disk checker for Windows, Linux, Unix systems

  • PRTG displays all memory capacities on just one dashboard

  • Automatic diagnosis of
    your hard disks

  • PRTG informs you before
    reaching disk space limit


Free Download

Unlimited version of PRTG for 30 days. After 30 days, PRTG reverts to a free version.
Or, you can upgrade to a paid license anytime.






Get an overview of your network’s disk space and memory status

There’s nothing more frustrating than when a text you’ve been working on for hours suddenly disappears, or when an installation you’ve been waiting patiently to complete is abruptly aborted. Disk space must be available for automatic updates, the saving of user data, and the input of data into CRM or ERP software forms: every network contains a number of processes which write data onto the hard disk. In order to avoid data losses, there must always be sufficient disk space.

PRTG monitoring runs attentively in the background, regulates available hard disk space, and provides prompt alerts in the event of an impending deficiency. Administrators can therefore take appropriate measures to avoid problems related to a lack of hard disk space. This is the only way to ensure the smooth functioning of business processes.

Simply set the desired threshold value for alerts and turn your attention to other tasks. Administrators are alerted as soon as the memory level falls below this value, and can free up disk space by deleting data which is no longer necessary or scaling existing space by way of capacity expansions.

Thanks to PRTG, the entire staff can work with peace of mind.


7 good reasons to choose PRTG as your hard disk checking tool

Avoid frustration

Avoid frustration

Employees can be sure there is sufficient memory whenever they save their data. Work processes are uninterrupted. Hours of work are saved. And employees are spared frustration.


Secure your data

Secure your data

Data is becoming more and more valuable, and the loss of precious information (e.g. customer data) can be extremely costly. With PRTG, data losses due to failed save attempts are avoided.


Stay up-to-date on free disk space

Stay up-to-date on free disk space

No need to verify the level of memory yourself. PRTG monitors this for you and promptly lets you know when space runs low.


Be quick to act

Be quick to act

You will be notified promptly if the amount of available disk space is approaching its limit and if hardware must be scaled.


Automated processes

Automated processes

Existing hard disks, statuses, and disk space are automatically recognized during setup. The administrator has nothing more to do.


Health check ups

Health check ups

Thanks to health check-ups, server failure and data loss can be prevented. And hard disks can be replaced on time.


Oversee network systems

Oversee network systems

Even network file systems get checked.


Free Download

Unlimited version of PRTG for 30 days. After 30 days, PRTG reverts to a free version.
Or, you can upgrade to a paid license anytime.


Your disk space at a glance
– even on the go

PRTG can be started within minutes and it's compatible with many mobile devices.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.


PRTG monitors these vendors and applications, and more, in one view!




“The greatest advantage of PRTG? You get to rest easy.“

Steffen Ille, Bauhaus-University of Weimar, Germany


This is what hard disk monitoring looks like in PRTG


Running out of disk space?
This short video explains folder monitoring


PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.


PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the auto-discovery and pre-configured device templates.

PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.



PRTG gathers this
data for you


 i What is a sensor?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)


  • Disk space monitor for Unix systems ("Total disk space Unix")

  • Disk space monitor for Linux systems ("Total disk space Linux")

  • Total disk space monitor for Windows ("Total disk space Windows")

  • Performance and disk space monitoring of storage area networks (SANs)
  • Monitoring of network-attached storage (NAS) of vendors like Synology or Oracle
  • File modifications - you’re alerted if the files you have flagged are modified

  • Existence of files - is a certain file even available?

  • Hard disk health - automatic diagnosis of your hard disks with respect to integrity, temperature, and other attributes

  • Hard disk speed - is the speed up to par?

  • Hard disk failure - is the hard disk responsive? Does it display an error message?

  • Measure the disk space of SMB file network systems (free & total) ("Share Disk Free-Sensor")

  • Find over 250 sensors in our sensor list

Free Download

Unlimited version of PRTG for 30 days. After 30 days, PRTG reverts to a free version.
Or, you can upgrade to a paid license anytime.


Trusted by 500,000 users
and recognized by industry analysts as a leader

“Fantastic network and infrastructure monitoring solution that is easy to deploy and easier still to use. Simply the best available.”

Read more reviews

“Software is absolutely perfect, Support is superior. Meets all needs and requirements, This is a must have solution if you are needing any form of monitoring.”

Read more reviews

“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”

Read more reviews


How does checking your disk space with PRTG work?


PRTG Network Monitor tracks disk space development across the entire network and maintains an overview of the storage levels of Unix, Linux, and Windows systems. PRTG monitors physical and logical drives, web servers, file servers, applications, and other servers. Furthermore, the Share Disk Free Sensor monitors the amount of free disk space on SMB network file systems. PRTG also supports encryption via the Secure Shell network protocol.

The utilization of the disk space of physical and logical drives in Windows systems is monitored with WMI. PRTG logs available disk space, records file modifications, and checks if certain files exist. In addition, PRTG boasts sensors which test the "health” of the hard disk and promptly warn of any possible errors. The Share Disk Free Sensor uses SNMP and SSH to monitor available space on the hard disks of Linux/Unix systems.


You want to know more about other network-related monitoring topics?



PRTG The Swiss Army knife

PRTG: The Swiss Army knife for sysadmins

Adapt PRTG individually and dynamically to your needs relying on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • REST Custom Sensor: Monitor almost everything that provides XML or JSON


Still not convinced?



More than 500,000 sysadmins love PRTG

PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.

Still not convinced?


Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.




Free Download



Try PRTG for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free. Start now with your 30-day trial.




Network Monitoring Software - Version (September 21st, 2021)


Download for Windows and cloud-based version PRTG Hosted Monitor available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications


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