If they are all accessing the NAS directly from their systems and you want them to access or control access to it from Windows Server, then yes, you can install FSRM and set up the quotas for it.
Depends now on how they are accessing the NAS already - if everyone is already on FSRM:
- Create a File Screen Template: To create a File Screen Template, open FSRM, go to File Screen Templates > Create File Screen Template. In the "Create File Screen Template" wizard, give the template a name (e.g., "Downloads Quota") and select the "Passive screening" option. Click "Next."
- Define the file group: In the "File groups" section of the wizard, click the "Add" button and select "Files in a folder and all subfolders." Browse to the location of your shared folder and select the "Downloads" folder. Click "OK" to close the file selection dialog.
- Set the file screen options: In the "Screening" section of the wizard, select the "Define custom file screen properties" option. Then, click the "Customize" button to specify the maximum size of the Downloads folder. In the "File screen properties" dialog, select the "Quota" tab, and set the maximum size limit for the "Downloads" folder. Click "OK" to close the dialog.
- Create a File Screen: To create a File Screen, go to File Screens > Create File Screen. Give the File Screen a name (e.g., "Downloads Quota"), and select the File Screen Template you created in the previous step. Select the "Add" button, and browse to the location of your shared folder. Select the "Downloads" folder and click "OK" to close the folder selection dialog.
- Set Quotas: Once you have created a File Screen for the "Downloads" folder, you can set quotas on specific folders. To set a quota, go to Quota Management > Quotas > Create Quota. Give the quota a name, select the user or group you want to apply the quota to, and specify the size limit for the "Downloads" folder.
- Apply Quotas to Folders: To apply the quota to a specific folder, go to the folder's Properties > Quota > Quota Settings > Edit Quota Properties. Select the quota you created in the previous step and click "OK" to close the dialog.
Repeat steps 4-6 for each user or group you want to apply the quota to. This will ensure that each user's "Downloads" folder is limited to the specified size limit.