SET BLOCKSIZE Command
Specifies how Visual FoxPro allocates disk space for the storage of memo fields.
Specifies the block size in which disk space for memo fields is allocated. If nBytes is 0, disk space is allocated in single bytes (blocks of 1 byte). If nBytes is an integer between 1 and 32, disk space is allocated in blocks of nBytes bytes multiplied by 512. If nBytes is greater than 32, disk space is allocated in blocks of nBytes bytes.
If you specify a block size value greater than 32, you can save substantial disk space.