Log into the Admin Web interface.

Hover over the Items module, and from the drop-down menu click on Manage.
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In the Export Excel File section, click on Download Items - this action will trigger an Excel file to be downloaded to your machine that includes all of the items in the system.
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Open the Excel file from step 3 and make the updates that are needed, for example change the name of an item, the subcategory they are assigned to, size, etc.
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After all updates are made, save the file.

In the Import Excel or Zip File section on the same web page, click on Choose File.
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Navigate in the file explorer to the file you saved on step 5, click on the file, and then click on Open.
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In the same Admin web page, click on Import File.
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