The largest compatible Samsung Galaxy Tab 4 Micro SD Card is 64 GB. There are two compatible Samsung Galaxy Tab 4 64 GB microSD cards I would recommend for use. Both are fast cards, but price differences may sway your decision.
With 64MB of storage, 90MB/s read speed and up to 50MB/s write speed, the fastest Samsung Galaxy S5 compatible microSD card is the Samsung Electronics 64GB PRO Micro SDXC. This Samsung card is available in 16GB and 32GB with the same performance in read/write speed.
A close second in speed with 64GB of storage, 80MB/s read speed and up to 50MB/s write speed is the SanDisk Extreme Plus. The SanDisk card is not only one of the fastest compatible Samsung Galaxy S5 microSD cards, it has a long track record of reliability.
If 64 GB of storage is more than you need, there are both 16GB and 32GB microSD cards available. These are less pricey but just as reliable as the larger storage models. The table below list other compatible Samsung Galaxy Tab 4 Micro SD cards.
Compatible Samsung Galaxy Tab 4 Micro SD Cards
Compatible Micro SD Cards
|Samsung Electronics 64GB PRO Micro SDXC||64 GB||90/50 MB/sec|
|SanDisk Extreme Plus||64 GB||80/50 MB/sec|
|Samsung Pro microSDXC Extreme Speed||64 GB||70/20 MB/sec|
|Samsung High Speed microSDHC||32 GB||24/13 MB/sec|
|Samsung Plus microSDHC||16 GB||48/23 MB/sec|