Then you would encounter another problem, extended attributes arn't usually really portable between files system / operation systems (as the name 'extendded' su

Then you would encounter another problem, extended attributes arn't usually really portable between files system / operation systems (as the name 'extendded' suggests, it may vary between FSs or even not available at all). And may gone easily if any of the programs not operate on them correctly. Windows would show a big warning if your copy operation may cause the extra metadata along the file to gone, but I am not sure whether linux will do that.