ok so this post is coming to you via my 2008 dell laptop
it originally ran mint on a disc spinner, it now runs [mint] lmde5 on a second hand SSD, but uses the same tools
my inxi
Drives:
Local Storage: total: 111.79 GiB used: 34.05 GiB (30.5%)
ID-1: /dev/sda vendor: Kingston model: SV300S37A120G size: 111.79 GiB
Partition:
ID-1: / size: 105.53 GiB used: 34.05 GiB (32.3%) fs: ext4 dev: /dev/sda2
Swap:
ID-1: swap-1 type: partition size: 4 GiB used: 0 KiB (0.0%) dev: /dev/sda1
Memory: 3.8 GiB used: 1.46 GiB (38.5%)
my drive test
If INXI is showing the expected amount of ram then there is no problem with your ram,
disc health check is found in, LM menu, all applications, discs, then click on target drive [if you have more than 1] then the 3 dots [upper left] and click on smart data check
note i have 4gb of ram but it only shows as 3.8 due to the rest being allocated to graphics&sound