I believe if you read the note at the top of the update page, it says to use smaller packages if your thrumb drive's decoding software can't cut the mustard. So plan it for three small packages if you are going to upload all the things available. As sectionals come due at different times, it is not necessary to download all the sectional. Also if you only fly in one area of the country, pick and choose which states to download for approach charts, The same for enroute charts.