remove broken links

Author: PhilKang0704

articles/storage/files/azure-files-case-study.md

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 ## Azure Files NFS for SAP use case
 
-A global insurance company runs one of the largest SAP deployments in Europe, which it historically managed on its own private cloud. As the company continued to grow, its on-premises hardware resources became increasingly scarce. To improve scalability and performance, the company moved its SAP environment to Azure, using Azure Virtual Machines and Azure Disk Storage. It used Azure Files to provide NFS file storage for its Linux-based SAP servers, eliminating the burden and costs of managing on-premises NFS file servers. With Azure Files, the company is also able to easily operate business-critical SAP transport directories. [Check out the full story here](https://customers.microsoft.com/story/1557513300029587275-munichre-insurance-sap-on-azure).
+A global insurance company runs one of the largest SAP deployments in Europe, which it historically managed on its own private cloud. As the company continued to grow, its on-premises hardware resources became increasingly scarce. To improve scalability and performance, the company moved its SAP environment to Azure, using Azure Virtual Machines and Azure Disk Storage. It used Azure Files to provide NFS file storage for its Linux-based SAP servers, eliminating the burden and costs of managing on-premises NFS file servers. With Azure Files, the company is also able to easily operate business-critical SAP transport directories.
 
 ## Azure File Sync business continuity use case
 
 An environmental engineering company with 2,500 employees spread across 80 offices faced two major problems:
 1. Constantly running out of local disk space on their on-premises file servers 
 2. The looming threat of natural disasters, fires, and power outages
 
-Either of these situations could cause sudden server outages, resulting in a productivity and business cost to their bottom line. By adopting Azure Files along with Azure File Sync, they were able to improve server recovery times to nearly instantaneous and give their employees the ability to work without interruptions. [Check out the full story here](https://customers.microsoft.com/story/1366262928243552238-kleinfelder-professional-services-infrastructure).
+Either of these situations could cause sudden server outages, resulting in a productivity and business cost to their bottom line. By adopting Azure Files along with Azure File Sync, they were able to improve server recovery times to nearly instantaneous and give their employees the ability to work without interruptions.
 
 ## Azure File Sync collaboration use case
 
-A sportswear brand was looking for ways to elevate the speed and ease of collaboration across different locations. The company used Azure File Sync along with Azure Virtual WAN to get the best of both worlds: an on-premises performance cache for local users, plus cloud scale and worldwide syncing. This reduced latency, improved security, and enhanced teamwork. It also simplified IT management and reduced the total cost of ownership for running file services. [Check out the full case study here](https://customers.microsoft.com/story/1384243648504800717-puma-consumer-goods-azure-virtual-wan).
+A sportswear brand was looking for ways to elevate the speed and ease of collaboration across different locations. The company used Azure File Sync along with Azure Virtual WAN to get the best of both worlds: an on-premises performance cache for local users, plus cloud scale and worldwide syncing. This reduced latency, improved security, and enhanced teamwork. It also simplified IT management and reduced the total cost of ownership for running file services.
 
 ## Azure Files large files use case