Hello,
I am very glad that my advice was so useful.
The fact of holding a Larga Duracion UE residence card will allow you apply for a work permit in other EU countries however, it does not grant you the permit to work immediately; you need to file the relevant application form providing you meet the requirements set by that specific country, as each country has a right to determine and regulate which are the conditions to grant a work permit to foreigners. The fact of holding the long stay residence card in another EU country under regimen comunitario, will help in the sense that the access will be slightly simplified and following more flexible and easier paths to eventually obtain the permit, compared to other individuals holding Regimen general residence cards.
Now, in response to your specific questions:
1. Hope now i can do work in whole Europe now? - No, each country has different rules. You would be able to work in all EU countries if you had EU nationality.
2. Once I get larga duracion EU., do I have to return my residency Permanent comunitario? or i can use both? - You can only hold one residence card; the new one will invalidate the former one.
3. If i go to other country, I start business there and have business in Spain also, after 10 years, can i apply for nationality? - Spanish citizenship can be applied fro after 10 years if legal residency. Therefore, if your Spanish residency is never cancelled you will be able to apply for nationality no matter you have businesses in another countries.
4. If i do not go to other country and live and do work in Spain, after 10 years, can I apply for nationality? - Yes.
Regards,
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