micro SDs card for Pinebook Pro

[wdt]

Well, this seems to be a good spot, labeled and all
All the tests are from 1-2 years ago, I can summarize
This is from my own research and following armbian/tkaiser,
and trying to find out how to use flash "best"
The people who really test the longevity are those using dash-cams
Rare for a card to last a year, but that is a single threaded job
The cards controller is doing all kinds of things, "behind your back"
and web browser keep a cache, just checked ,, 400M, gets really laggy
waiting to write updates,  also apt-get dist-upgrade can take hours with a crap card
Anyway, the #1 rule,ALWAYS check for fakes, the first time it is in your hand (f3 or h2testw)
Even amazon has sold fakes
Cards were originally made for cameras, a simple job, 1 write, 1 read
Try taking 3 photos quickly, doesn't work so well does it?
anyway, no name cards always have poor 4k and 16k speeds ~ or< 1000
Brand name (sandisk, kingston, lexar, etc) are often OK, but not exceptional (1000-3000)
Generally  evo are better, sometimes only a bit, sometimes 50% (not the 16G,,only OK)
I have stopped buying "crap" cards unless they are REALLY cheap,
those I ALWAYS test right away (well, I always test), and I wouldn't use them for an OS

Here another,,samsung evo plus 64G (not sure if same as evo+)
                                                                               random random
             kB  reclen    write  rewrite    read    reread    read     write    
         102400         4     3927     4100     10320    10313    10165     2640                                                                
         102400       16     6460    10519    25852    25728    25699    10796                                                                
         102400     512    25605    20796    82719    82950    76700    27167                                                                
         102400    1024    23151    22794    84709    84991    81562    20229                                                                
         102400   16384    23476    25132    85421    86309    86470    26595  
These are "typical" good speeds, anything 1/2 (or<)the 4k and 16k speed is not fit for an OS

And something different, a 32G eMMC module, all usb3
(sandisk,, from amerdroid?) I don't know why so slow
                                                                             random    random                                      
             kB  reclen    write  rewrite    read    reread    read     write    
         102400        4     4247      4289      6256      6290      5368     4205                                                                
         102400      16    11641    11937    19502    19549    11819    11961                                                                
         102400     512    40563    43955    47143    47122    36640    38861                                                                
         102400    1024    40829    44497    47316    47248    41644    41384                                                                
         102400   16384    40857    44390    47338    47354    46975    44020

Really you have to test yourself, a slow card will give disappointing results
The last 2 columns should have 'random' over them