To format a computer means that all your data will be lost. Your operating system, programs, emails, drivers, pictures, everything! All of the updates on your programs will be gone, infarct the every entire program will be gone.
This drop in TSH is an attempt to return circulating thyroid hormone levels to normal. So, a test to measure the amount of TSH in your system will usually show lower than normal TSH when the thyroid is overactive. So, in general, LOWER TSH = OVERACTIVE THYROID / HYPERTHYROIDISM.
LOW TSH suggests you are closer to HYPERthyroidism (overactive), and have too much thyroid hormone circulating. HIGH TSH suggests you are closer to HYPOthyroidism (underactive), and you don't have enough thyroid hormone circulating.