Manually constructing URL to reach out to your file with expression is found painful, when we need to get the app id, table name etc statically, and push into the part of expression. Sometime decode/encode issue is throw the additional pains to us.
To remove all those pains and concerns, this expression could be the most efficient and effective to construct the URL, most importantly automatically and dynamically.
CONCATENATE(‘https://www.appsheet.com/template/gettablefileurl?appName=’, ENCODEURL(CONTEXT(AppName)), ‘&tableName=’, ENCODEURL(CONTEXT(Table)), ‘&fileName=’, ENCODEURL([IMAGE]))
Symply the change of the column name which refer to your file/image type field at the last part of the expression.
Even after copying the app (new app will have different name), this expression will not be broken up. Low and least maintance as well.