@James ********
, you can open a straight savings account if you want to. Keep in mind if you're going to open a fixed account that there are two types in thailand.
One type of fixed account allows you access to the money anytime (even if accessing it makes you lose all the interest or get a penalty) and this is the one you CAN use for the bank account if you want to
The other type of fixed account does NOT allow you to access the money during the term of the deposit (it's frozen in the account) and this is the one you CANNOT use for the bank account.