Dell Inspiron 3521 Owner's Manual page 16

3 Use your fingertips to carefully spread apart the securing clips on each end of the
memory-module connector until the memory module pops up.
4 Remove the memory module from the memory-module connector.
1 securing clips (2)
3 memory module
16
| Removing the Memory Module(s)
2
1
3
2 memory-module connector