Paessler PRTG

Stop storage issues before they escalate with monitoring disk space


  • Identify storage issues before they lead to downtime or system failures
  • Maintain network performance by making sure your storage resources are being used efficiently
  • Save money by optimizing data storage & avoiding unnecessary hardware purchases

Our users give top ratings for monitoring with Paessler PRTG



PRTG makes disk space monitoring easy

Custom alerts make it easy to monitor, identify, and prevent storage space issues.











Monitor your network’s disk space and memory in real time

Paessler PRTG is your IT assistant, attentively running in the background, regulating available hard disk space, and providing prompt alerts when there’s an impending deficiency in space or memory

Take control with informed resource & capacity planning


Planning for future capacity needs can be challenging. Monitoring disk space with PRTG gives you a single, easy-to-understand overview to help you stop unexpected resource shortages, locate “zombie” processes, and reduce overprovisioning instances.

Monitoring can also show you which applications and processes use the most disk space, so you can make more informed resource allocation decisions.



Optimize your network’s performance


Every network contains processes that write data onto the hard disk. Running out of disk space or memory can lead to slow network performance, crashed applications, and bottlenecks in the system.

PRTG ensures server disk space is available for automatic updates, saving user data, and putting data into CRM and ERP software formats.

Detect potential issues proactively


PRTG memory and disk monitoring provide early warning signs of potential issues like low disk space or memory leaks, giving you the extra edge you need to keep your file servers and network running smoothly.

Set your desired alerting threshold value and get back to other tasks. Administrators are alerted when the free space metric falls below this threshold and can proactively free up disk space.


Anticipate hardware & software needs


Hardware monitoring helps you identify hard drives or memory modules that are failing before they cause network outages or data loss.

Not only does disk space monitoring allow administrators to perform timely hardware maintenance, but it also helps ensure application stability by reducing memory leaks and high memory usage.



What disk space monitoring looks like in PRTG

Diagnose network issues by continuously monitoring your disk space. Show disk space usage in real time and visualize data in graphic maps & dashboards to identify problems more easily. Gain the visibility you need to troubleshoot disk space issues and prevent network downtime.



Start disk space monitoring with PRTG and see how it can help you maintain the reliability, performance, security, and cost effectiveness of your network.












4 reasons to choose PRTG as your disk space monitoring tool

Easy to set up

Existing hard drives, their status, and the available disk space are automatically recognized during setup so that you have nothing more to do.


Get real-time alerts

PRTG’s alert system works in real time, promptly notifying you when the free disk space value falls below a predefined threshold. Hours of work are saved. Work processes are uninterrupted.


Keep your data secure

Data is becoming more and more valuable, and the loss of precious information (for example, 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

There’s no need to verify available disk space yourself. PRTG monitors this for you and directly lets you know when free space runs low.



IT experts agree: Paessler PRTG is a great solution for IT infrastructure monitoring


“All-around winning
network monitor”

logo it brief

“The real beauty of PRTG is the endless possibilities it offers”


“PRTG Network Monitor
is very hard to beat”


Easily find the source of the problem with our PRTG disk space monitoring solution

Real-time alerts and custom notifications make it easy to solve issues with disk storage.




PRTG is compatible with all major vendors, products, and systems

vendors applications blue


Empower your network monitoring and monitor disk space with PRTG

 i How PRTG defines sensors

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.)

  • Hard disk health: automatically diagnose 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?
  • Efficiently manage network resources by measuring the used disk space and available disk space of SMB file network systems with the Share Disk Free sensor

PRTG makes disk space monitoring easy

Custom alerts make it easy to monitor, identify, and prevent storage space issues.



Your disk space monitor at a glance – even on the go

Set up PRTG in minutes and use it on almost any mobile device.


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 in one view!


vendors vm ware



Create innovative solutions with Paessler’s partners

Partnering with innovative vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


baramundi and PRTG create a secure, reliable and powerful IT infrastructure where you have everything under control - from the traffic in your firewall to the configuration of your clients.

Read more

INSYS icom

With the combination of PRTG and Insys, the monitoring specialist Paessler and the industrial gateway manufacturer INSYS icom offer a practical possibility to merge IT and OT.

Read more


Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.

Read more


Easily find the source of the problem with our PRTG disk space monitoring solution

Real-time alerts and custom notifications make it easy to solve issues with disk storage.




“Easy to implement and configure with good technical support.”

R. v. S., ICT Manager at Heinen & Hopman Eng BV


Disk space monitoring: FAQ


1. What is disk space monitoring?

Disk space monitoring tracks and analyzes the storage space in a networked environment to understand the use and availability of drive space. This is essential for maintaining the health, performance, and reliability of a network’s infrastructure.

2. How does disk space affect server performance?

When a server’s disk space is low, you’ll quickly start to notice a degradation in performance, as well as a failure of automated tasks. Without the available space to handle backups, updates, and data saves, servers cannot work properly.

3. How does PRTG monitor the disk space of your servers?

PRTG monitors disk space on Windows servers, Linux servers and web servers using dedicated sensors that track available storage. It employs WMI or SNMP protocols to check Windows servers, ensuring that you're alerted before disks run low on space. For web servers, PRTG monitors file storage, including web content and logs, regardless of the operating system.

The system allows setting thresholds that trigger notifications via email, SMS, or push notification if disk space is running low, enabling prompt action to manage storage and maintain server efficiency. This proactive monitoring ensures servers are not compromised due to insufficient disk space.

4. What systems does PRTG run on?

PRTG is a hard disk space checker for Windows, Linux and Unix systems and can monitor disk space on physical and virtual drives.

5. What are my options if PRTG tells me my disk space is getting full?

It’s essential to take immediate action to prevent data loss and system crashes. There are several viable options, including:

  • deleting unnecessary files
  • archiving or moving data
  • resizing partitions
  • upgrading hardware
  • compressing data

6. What is a sensor in PRTG?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, for example the traffic of a switch port, the CPU load of a server, or the free space on a disk drive.

On average, you need about 5-10 sensors per device or one sensor per switch port.


PRTG the multi-tool

PRTG: The multi-tool for sysadmins

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

  • HTTP API: Access monitoring data and manipulate monitoring objects via HTTP requests
  • Custom sensors: Create your own PRTG sensors for customized monitoring
  • Custom notifications: Create your own notifications and send action triggers to external systems
  • REST Custom sensor: Monitor almost everything that provides data in XML or JSON format


More than just a monitoring tool:
Reasons our customers love PRTG



Still not convinced?


More than 500,000
sysadmins love PRTG

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


Monitor your entire IT infrastructure

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


Try Paessler PRTG
for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free.



Paessler PRTG 

Start disk space monitoring with PRTG and see how it can help you maintain the reliability, performance, security, and cost effectiveness of your network.



Network Monitoring Software - Version (May 2nd, 2024)


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


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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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