To disable data from being copied to the server, follow the instuctions below.
Steps:
1. Open the Administrator Directory and log in with a user that has administrative permissions to your site. The Administrator Directory is typically available at http://<server name>:6080/arcgis/admin.
2.Click data > config > update.
3.On the Update Datastore Configuration page, enter the following string into the Datastore Configuration Properties dialog box:
{"blockDataCopy": true}
4.Click Update.
And if you copy and paste the link I provided, does it take you anywhere? Can you try to clear your browser history or use a different browser?
<html> <head> <title>Data</title> </head> <body> <html> <head> <link href="https://community.esri.com/arcgis/admin/www/css/admin.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="/arcgis/admin/www/js/BigInt.js" charset="utf-8"></script> <script type="text/javascript" src="/arcgis/admin/www/js/Barrett.js" charset="utf-8"></script> <script type="text/javascript" src="/arcgis/admin/www/js/RSA.js" charset="utf-8"></script> <script type="text/javascript" src="/arcgis/admin/www/js/admin.js" charset="utf-8"></script> </head> <table width="100%" id="userInfoTable"> <tbody> <tr> <td id="titleCell">ArcGIS Server Administrator Directory</td> <td align="right" id="help"> Logged in: | <a href="https://community.esri.com/arcgis/admin/login?operation=signout">Signout</a> </td> </tr> </tbody> </table> <table width="100%" id="navTable"> <tbody> <tr> <td id="breadcrumbs"> <a href="https://community.esri.com/arcgis/admin">Home</a> > <a href="https://community.esri.com/arcgis/admin/data">data</a> > <a href="https://community.esri.com/arcgis/admin/data/config">config</a> > <a href="https://community.esri.com/arcgis/admin/data/config/update">update</a> </td> <td align="right" id="help"> <a href="https://community.esri.com/arcgis/admin/www/api/admin-rest-api.html">Quick Reference</a> | <a href="https://community.esri.com/arcgis/admin/www/doc/index.html" target="blank">API Reference</a> </td> </tr> </tbody> </table> <h2>Data Space</h2> <div class="body"> <table> <tbody> <tr> <td><b>Resources:</b></td> <td><a href="https://community.esri.com/arcgis/admin/data/items">Root Items</a></td> </tr> <tr> <td><b>Supported Operations:</b></td> <td><a href="https://community.esri.com/arcgis/admin/data/registerItem">Register Item</a></td> <td><a href="https://community.esri.com/arcgis/admin/data/unregisterItem">Unregister Item</a></td> <td><a href="https://community.esri.com/arcgis/admin/data/validateDataItem">Validate Item</a></td> <td><a href="https://community.esri.com/arcgis/admin/data/validateAllDataItems">Validate All Items</a></td> <td><a href="https://community.esri.com/arcgis/admin/data/findItems">Find Items</a></td> <td><a href="https://community.esri.com/arcgis/admin/data/computeTotalRefCount">Compute Total Ref Count</a></td> </tr> </tbody> </table> </div> </body> </html>
I ran into this as well and to see the /config option in the Admin API, you'll need SP1 installed.