I bought two of these 128 gb MicroSD cards which I formatted to Fat32, and I currently have about 62 gb in 35,000 files on each card.  I carry one card in my wallet and keep one in a safe deposit off-site.  I've been through the SanDisk literature looking to see if there are any restrictions on their use, other than as ordinary &#34;flash memory&#34; for file storage.  There are no restrictions I could find.  What I have found is that these 128 gb cards (and a SanDisk 64 gb card I bought previously) cannot accept 62 gb of data written from a computer without suffering errors.  I've had to resort to copying no more than 1/3 gb of data at a time to these cards, stopping, then starting another 1/3 gb until the complete data is copied.  The errors actually occur early on, at approximately the 2 to 3 gb point.  I have several other 128 gb flash memory sticks - the Lexar Echo series, as well as a hundred other lower-capacity flash memory cards, and do not have this overflow/error problem with any of those.  To repeat, there are no restrictions on the use of these memory cards (example: can be used only in a camera) given by SanDisk, and given that the 62 gb of data on each card has been verified as to integrity, they are not defective.