It says in the documentation a BLOB field has None Range/Precision. But a
64K segment limit.

Question 1. So the maximum size of a blob field is 64KB ?

Question 2. Does that mean that anytime you put something into a BLOB field
64 KB are allocated for it ?

Question 3. If for instance I would save in one record's BLOB field 100 bytes
and in another BLOB field 20 bytes that together they only occupy 120 bytes ?

Question 4. Is there anyway to save only the actual amount of bytes used
and no more ?