HP EliteBook 2540p

crwdns2936079:0crwdne2936079:0

crwdns2935359:0crwdne2935359:0

crwdns2935357:0crwdne2935357:0

crwdns2935361:0crwdne2935361:0

crwdns2935365:0crwdne2935365:0

crwdns2943215:0crwdne2943215:0

crwdns2943213:0crwdne2943213:0

1 × 1.8 inch Hard Drive, SATA, doesn't matter if it's old or new, as long as it has a SATA connection.—Of course, SSDs work, but they have to be SATA, as the computer obviously doesn't have NVMe Slots.
1 × Low Profile RAM, Low Profile

crwdns2915888:0crwdne2915888:0

crwdns2935375:0crwdne2935375:0 crwdns2915442:0crwdne2915442:0

crwdns2918526:0crwdne2918526:0

crwdns2935377:0crwdne2935377:0

crwdns2935379:0crwdne2935379:0

crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0