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Tracking free disk space across dozens of servers, storage arrays, and network shares is straightforward on a single system but gets complicated fast at infrastructure scale. Different platforms expose storage data differently: Windows uses WMI, Linux uses SSH, network storage typically speaks SNMP or a vendor REST API. Doing that manually across a mixed environment means logging into each system individually or maintaining a patchwork of scripts.
Paessler PRTG handles that layer centrally, without agents. Auto-discovery scans your network and creates sensors for detected storage devices, so you're not building that list by hand. Monitoring runs continuously from there: threshold breaches trigger alerts, and historical data lets you track usage trends before they become a capacity issue. All of it lands in one dashboard, whether you're managing Windows servers, Linux systems, NetApp arrays, or Hyper-V cluster shared volumes.
Storage consumption grows continuously: log files accumulate, databases expand, users upload. PRTG tracks that growth in near real time so your team has the information to act before a volume reaches critical levels. Threshold alerts give you a configurable window between warning and action.
Set warn at 80%, alert at 90%, or define whatever limits fit your environment. When a threshold breaches, notifications go out via email, SMS, push, or webhook. Continuous monitoring means sudden disk growth gets caught early, with enough lead time to free up space or expand capacity before anything downstream is affected.
Distributed infrastructure across headquarters, cloud instances, and remote sites calls for a centralized view of storage status. PRTG's remote probe architecture monitors disk space across all those locations from one dashboard. Deploy probes at each site to collect local data, with everything flowing back to a single interface. Whether your storage is on-premises, in AWS, or at a remote site, free space status is visible in one place.
Disk space monitored, alerts ready
VMware datastore capacity, always visible
Full device list, instant overview
Automated monitoring frees up the hours your team currently spends on routine disk space checks. PRTG's auto-discovery scans your network and creates sensors for detected storage devices automatically. Once configured, continuous monitoring runs 24/7 and only surfaces an alert when a threshold breaches. That's time back for work that actually requires your attention.
Start monitoring your infrastructure in minutes. No professional services, no complex configuration, no risk.
Budget cycles don't align with emergency storage purchases. PRTG collects historical disk space usage data and displays growth trends in visual graphs. Our user-friendly disk usage analyzer gives you visibility into storage consumption over weeks, months, or years. See how volumes trend over time, then use that data to forecast when you'll need more space. Export reports to justify budget requests or plan infrastructure expansion before you run out.
Live graphs, real-time performance data
Scheduled reports, always on time
Tickets keep your team aligned
Modern infrastructures mix Windows servers, Linux systems, NetApp arrays, Dell EMC storage, and Hyper-V environments. Managing vendor-specific tools for each creates complexity and blind spots. PRTG covers all major platforms using standard protocols (SNMP, WMI, SSH, and REST APIs) from a single interface.
PRTG uses native protocols to monitor disk space without agents or custom scripts. Choose the method that fits your environment: WMI for Windows, SSH for Linux, SNMP for network-attached storage. Here's how PRTG collects disk usage statistics across different platforms.
FEATURE | Manual Monitoring Manual Monitoring | With PRTG With PRTG |
|---|---|---|
Time to Set Up Monitoring | Manual Monitoring Hours or days to inventory servers, configure scripts, schedule checks | With PRTG Auto-discovery scans your network and creates sensors for detected devices — no manual inventory required |
Ongoing Effort | Manual Monitoring Daily manual checks across dozens of servers, compile data in spreadsheets | With PRTG Continuous monitoring runs 24/7 — you're only notified when thresholds breach |
Multi-Platform Coverage | Manual Monitoring Separate tools/scripts for Windows, Linux, NetApp, VMware — tool sprawl | With PRTG One platform monitors all via WMI, SSH, SNMP, and REST APIs |
Historical Trend Data | Manual Monitoring Manual log collection and spreadsheet tracking over time | With PRTG Automatic historical data collection with graphical trend visualization |
Alert Response Time | Manual Monitoring Hours or days until the next manual check discovers the problem | With PRTG Alerts fire as soon as a polling cycle detects a threshold breach — via email, SMS, or push notification |
Choose the PRTG Network Monitor subscription that's best for you.
| License Name | License description | Price | License Details | Get started | Pricing Details | |
|---|---|---|---|---|---|---|
| PRTG 500 | $200 | per month paid annually | Buy nowBuy now | Enough to monitor multiple aspects of 50 devices | ||
| PRTG 1000 | $358 | per month paid annually | Buy nowBuy now | Enough to monitor multiple aspects of 100 devices | ||
| PRTG 2500 | $742 | per month paid annually | Buy nowBuy now | Enough to monitor multiple aspects of 250 devices | ||
| PRTG 5000 | $1,300 | per month paid annually | Buy nowBuy now | Enough to monitor multiple aspects of 500 devices | ||
| PRTG 10000 | $1,642 | per month paid annually | Buy nowBuy now | Enough to monitor multiple aspects of 1000 devices |
No. PRTG monitors total free disk space across your infrastructure, not file-level analysis. Tools like WinDirStat, TreeSize, WizTree, and SpaceSniffer show which folders and files consume space on a single computer using treemap visualization. They scan your hard drive and show directory statistics, largest files, duplicate files, and space hogs down to individual file types and hidden files.
PRTG answers a different question: "What's the free space status across all my servers, storage arrays, and network shares?" Use PRTG for infrastructure-wide capacity monitoring, and desktop tools like TreeSize or WizTree for file cleanup on individual systems. Think of it this way: PRTG tells you which servers are running low on space, then you use file system tools to investigate what's filling them.
No. PRTG monitors free space totals and trends, it doesn't drill into individual files, folders, or directory structures. For file-level analysis, use native OS tools (the du command on Linux, storage reports on Windows Server) or third-party utilities designed for that purpose. PRTG focuses on infrastructure-wide capacity monitoring, not analyzing which caches or large files exist on individual systems.
Yes. PRTG monitors disk space across all major platforms using native protocols. Microsoft Windows systems use WMI, agentless and built into the OS. Linux, Unix, macOS, and Solaris systems use SSH connectivity. Network-attached storage from NetApp and HPE uses SNMP; Dell EMC Unity uses dedicated REST API sensors.
PRTG also monitors Hyper-V Cluster Shared Volumes and network shares accessible via SMB. In general, any device that exposes disk usage statistics through WMI, SSH, or SNMP can be monitored.
No. PRTG is a monitoring tool, not a disk cleanup or optimization tool. It monitors free space and alerts you when thresholds breach, but it doesn't delete files, clear caches, or perform cleanup operations.
Once PRTG alerts you to low disk space, you use operating system utilities (Disk Cleanup on Windows, package manager cache clearing on Linux) or third-party cleanup tools to reclaim space. PRTG provides the visibility to know when and where cleanup is needed. You decide what to remove based on your organization's data retention policies. Automated file deletion would be risky in enterprise environments where incorrect cleanup could delete business-critical data.
PRTG polls disk space sensors at configurable intervals. The default is 60 seconds, with options ranging from 30 seconds to 24 hours. When free space drops below your configured threshold, PRTG triggers an alert after the next polling cycle completes, via email, SMS, or push notification.
You don't need to watch dashboards continuously. The user-friendly interface displays historical data and trend graphs that update automatically, so you can review capacity changes over time. The combination of threshold alerting and historical visualization covers both immediate problem detection and long-term capacity planning.
No agents required for most monitoring methods. PRTG uses native protocols already built into operating systems: WMI for Windows (enabled by default in most environments), SSH for Linux/Unix/macOS (standard remote access), and SNMP for network storage (enabled on enterprise storage arrays).
You provide credentials, and PRTG queries disk space remotely. The only exception is PRTG's optional remote probes, which extend monitoring to isolated network segments. But these monitor multiple systems from one probe installation, not per-server agents. This agentless approach reduces deployment complexity and eliminates the overhead of maintaining monitoring software on every server. The functionality works through protocols the operating system already provides.
Network Monitoring Software – Version 26.1.116.1532 (February 9th, 2026)
Download for Windows and cloud-based version PRTG Hosted Monitor available
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