Originally Posted by DaveM59
...All recordings were done using a 64GB Lexar USB3 flash drive....
You should be fine using a flash drive that's fast enough
for HD recording.
Trouble is that most flash drive makers don't seem to want you to know how SLOW their drives are. Typically, the larger the capacity of the flash drive the faster it writes (read speeds are always faster than write speed, but they're not as important as write speed).
Write speed is very important to assure our HD files are being faithfully and completely written to the drive we're using. This requires a write speed at least as fast as a typ. HDD, or 125MB/s. Without a good write we can see bad playback w/o realizing it's caused by a poorly written
Here's a Lexar page
on many of their flash drives with MANY SLOW-writing drives... there's only ONE on that page that's fast enough for recording HD, the P20 down the page priced at $74.99, with 270MB/s write speed. Other mfgrs seem to have many faster drives that Lexar.
People who'd really like to use flash drives need to do a little digging to find one that actually tells you what the write speed is! Also, many drives are USB 3.0 and natively much faster than 2.0 but operate at 2.0 speed if your machine is only 2.0, which most are today, so take that into count as well... i.e., get the FASTEST flash drive you can afford to assure best results in recording (writing) and simultaneously playing (reading) HD files, which we often do.
Here's a help file on this subject JFTHOI:
Worried about "slow" FT drives?
Best FT drives for DVRs will be larger-capacity
USB 3.0 drives (128+GB), which are *designed* for faster reading/writing than smaller-capacity models from same mfgr. This can prevent the playback-stuttering-while-recording reported on other DVRs. Here's a good comparison chart
that might make your research easier? Look for write speed at least
faster than 125MB/s, the typ min. write speed of HDDs. Beware of sellers who show only read speed, which is always (much) higher and not nearly as important as write speed for our recorders. See note on Samsung 850 Pro below.
Worried about multiple writes/rewrites?
How about "Two freaking petabytes" (2,000 TB) in SSD endurance tests so far (tests performed "way back" in 2013-2014)
. All depends on the type of flash memory inside, e.g., the Samsung 840 model in that report was not a great performer due to its use of TLC flash but its new 850 models for 2017
(up to 4TB) will be using 2-bit NAND MLC and have 470-520MB/s write speed(!)